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Examining the Trek 3900: Is This Bike Worth Buying?

September 27, 2023

Examining the Trek 3900: Is This Bike Worth Buying? | PedalChef

‍ Key Takeaways

  • The Trek 3900 combines durability and versatility, making it suitable for diverse terrains and rider levels.
  • With proper maintenance, the Trek 3900 promises longevity, underlining its value for both beginners and intermediate riders.
  • Despite its entry-level categorization, the bike offers a blend of reliable features and customization options, providing a tailored riding experience.

This article may contain affiliate links where we earn a commission from qualifying purchases.

‍ If you are looking for a new mountain bike, the Trek 3900 is one option worth considering. We’ll take a look and see if this bike is worth the investment.

The Trek 3900 is a versatile mountain bike with Trek's Alpha Aluminum frame, offering lightweight durability. It's suitable for city streets and trails, with features like a suspension fork for comfortable riding and Bontrager-approved rims for enhanced handling.

The following sections will discuss the Trek 3900 regarding ride quality, frame and fork performance, wheels and brakes, and overall value. We will provide you with our opinion based on firsthand experiences and thorough research, including sharing insights from other riders. The information provided was also discovered through personal tests using the bike.

TABLE OF CONTENTS

‍ Trek 3900 Bike Overview

The Trek 3900 is a popular mountain bike that has been on the market for quite some time. Its history can be traced back to when Trek Bikes was first established in the mid-1970s.

Over the years, the bike has evolved, with many models being suitable for different riders and terrains. The Trek 3900 has plenty to offer to cruise the city streets comfortably and confidently.

Its frame comprises Trek's Alpha Aluminum, making it both lightweight and robust. Available in various frame sizes, it caters to riders of different heights. The bike is equipped with a suspension fork, which allows for comfortable and efficient riding on multiple terrains.

The Trek 3900 features wheels with sturdy Bontrager-approved rims, providing durable handling on city streets and trails. Meanwhile, its wide range of tires offers excellent grip and traction on various surfaces.

Beyond these core specifications, the Trek 3900 also features disc-compatible dropouts, fenders, and rack mounts. These extras allow for easy customization and the addition of valuable accessories, depending on your preferences and needs.

Trek 3900 Bike Key Features

The Trek 3900 is an exemplary model that combines advanced technology with sleek design. Its distinctive features make it an ideal choice for those seeking performance and style. Here are a few worth mentioning.

Formula Alloy FM31 Wheels

The Trek 3900 features Formula Alloy FM31 wheels, providing a lightweight yet durable option that can handle various terrains. These wheels are well-suited for city streets and light off-road trails, offering the user a smooth and consistent ride.

Moreover, their precise construction ensures better traction and stability, especially during sharp turns and sudden stops, boosting rider confidence. The elegant design also adds an aesthetic appeal to the bike, making it functional and visually captivating.

Alpha White Aluminum Frameset

This mountain bike's Alpha White Aluminum frameset is both lightweight and sturdy. It has disc-compatible dropouts for enhanced braking performance and fender mounts for mud and water protection.

The frame is available in various sizes to cater to many riders. Plus, you will notice the adjustable headset, durable stem, sturdy cassette, and bi-oval downtube all significantly influence how this bike performs on various terrains.

This blend of design and technology ensures longevity and peak performance, even under the toughest conditions. Its sleek finish further amplifies the bike's overall appearance.

SR Suntour XC Suspension Fork

The Trek 3900 has an SR Suntour XC suspension fork, which absorbs bumps and provides a comfortable ride on rough terrain. With this fork, you can enjoy smoother handling and better control when tackling challenging trails.

The design also reduces strain on the rider's body, especially the shoulders and wrists. It's crafted for durability, ensuring it stands the test of time and rough terrains without wearing out easily, making your adventures worry-free.

3X8 Drivetrain

The bike's 3X8 drivetrain offers various gears to suit different riding styles and conditions. The rear derailleur on the Trek 3900 ensures smooth and reliable shifting performance.

This setup is perfect for beginners getting used to various terrains and gauging their preferred cycling modes. This can be tackling steep climbs or riding high speeds on flat surfaces.

The drivetrain requires minimal maintenance, ensuring you spend more time riding and less time tuning. Its intuitive design facilitates swift gear transitions, enhancing the overall cycling experience.

Trek 3900 Performance Analysis

When assessing the caliber of a mountain bike, it's imperative to analyze its performance in real-world conditions. Here is what we learned about the Trek 3900 after various test rides.

The Trek 3900 mountain bike offers a comfortable ride owing to its saddle and handlebar design. The handlebar Bontrager ensures a secure grip and good handling. Its saddle provides a cushioned surface that supports you throughout your journey.

Including specialized grips further accentuates the user experience, providing a layer of security and a tactile feel.

With its 3X8 drivetrain, the Trek 3900 offers a wide range of shifts, making it suitable for various speed requirements. The bike's lightweight frame and wheels contribute to its overall speed capabilities, allowing for swift acceleration and effortless rides.

Whether racing downhill or cruising, it promises a responsive and efficient speed performance. I enjoyed how quickly I could pick up the pace on longer riders without a struggle.

The Trek 3900's frame is built with Alpha White Aluminum, ensuring the bike's solid and sturdy foundation. Most of the components are long-lasting, except for the Suntour forks, which might require replacement after extended use.

The stock tires may show signs of wear sooner than expected, so monitoring them for timely replacement is essential. While the stock tires offer good traction and performance, they may show signs of wear sooner than expected.

Terrain Adaptability

The Trek 3900 mountain bike performs reasonably well on general pavement and city streets. However, its true capabilities shine on off-road trails and uneven terrains, thanks to its front suspension and knobby tires.

This bike offers stability and control for riders who frequently encounter rough paths. This is why the brake design is the way it is, too.

How Long Does The Trek 3900 Last?

The Trek 3900 is a popular mountain bike known for its durability and ability to handle various terrains. This bike can last for several years with proper care and maintenance, providing enjoyable riding experiences.

The bike's frame is constructed from Alpha Silver Aluminum, ensuring a long-lasting and lightweight design. In terms of components, most of them are Bontrager-approved, meaning they are of good quality and reliable.

To extend the life of the Trek 3900, it's essential to keep up with regular maintenance. This includes cleaning and oiling the chain, checking and adjusting the rear derailleur, and inspecting the brakes and wheels for wear and tear.

Be sure to visit your local bike shop for tune-ups and component replacements if needed. For city streets riding or daily commutes, the Trek 3900 comes with disc-compatible dropouts and fender mounts.

While the Trek 3900 may not be the most advanced mountain bike on the market, it is certainly a durable and reliable option for beginners and intermediate riders. In our opinion, with proper care and maintenance, the Trek 3900 is well worth the investment.

Is The Trek 3900 Good For a Beginner?

The Trek 3900 is one of the models in Trek's entry-level mountain bike lineup from years past. For beginners looking to get into mountain biking or casual riding, the Trek 3900 offers several benefits.

First, Trek is known for building sturdy frames. The 3900 model, in particular, features an aluminum frame, which is both lightweight and durable. Being an entry-level bike, the Trek 3900 is typically priced more affordably than more specialized or higher-end mountain bikes.

While the components on the 3900 aren't top-of-the-line, they are more than adequate for beginners and casual riders. They offer a decent mix of reliability and performance for the price.

For a beginner or someone looking for a versatile and affordable bike for casual riding or light trail use, the Trek 3900 is a good option.

Is The Trek 3900 Bike Worth Buying?

The Trek 3900 boasts a sturdy frame that is reportedly quite durable. The frame geometry is designed to handle a variety of trails and city streets, making it suitable for different levels of riders.

Additionally, the bike comes equipped with fender mounts and disc-compatible dropouts, allowing for personalized upgrades and the addition of accessories. One area that stands out in the Trek 3900 is its brakes.

The stock brakes provide good stopping power, though some users report reduced effectiveness at high speeds. Upgrading the brakes might be something to consider, depending on your riding style and preferences.

The bike's gearing and drivetrain, featuring a wide range and rear derailleur, have been praised for their performance on various terrains. However, it's important to keep in mind that some components, such as the forks and pedals, have received mixed reviews, with riders suggesting possible upgrades.

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About THE AUTHOR

Danny Lawson

Danny Lawson

Mountain biking is more than just a hobby for me - it's a way of life. I love the challenge and excitement that comes with it, and I'm always pushing myself to go faster and ride harder. Some people might think that mountain biking is dangerous, but I see it as the only way to live.

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Trek Logo

Specifications

  • Frame Alpha White Aluminum w/externally relieved head tube, bi-axial down tube, disc compatible dropouts
  • Wheels Alloy front hub, Shimano RM30 rear hub; Matrix 550 rims w/brushed sidewalls
  • Wheel Size 26"
  • Tires Bontrager Connection Trail, 26x2.0"; 27 tpi
  • Crank SR Suntour XCC-T102 42/34/24
  • Front Derailleur Shimano C050
  • Rear Derailleur Shimano Acera
  • Shifters Shimano EF50, 8 speed
  • Brakeset Tektro V w/ Shimano EF50 levers
  • Handlebar Bontrager Approved, 30mm rise
  • Saddle Bontrager Approved
  • Seatpost Bontrager SSR, 20mm offset
  • Stem Bontrager Approved, 25 degree
  • Headset VP-A76C-TK, 1 1/8" semi-cartridge, sealed

Q: Where to buy a 2009 Trek 3900?

The 2009 Trek 3900 may be purchased directly from Trek .

Q: What size wheels does the 2009 Trek 3900 have?

The 2009 Trek 3900 has 26" wheels.

Q: What size 2009 Trek 3900 should I get?

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Trek 3900 Mountain Bike Complete Guide

Mountain biking is one of the most thrilling and adventurous outdoor sports out there. Whether you’re a seasoned pro or just starting out, having the right bike can make all the difference in your experience. The Trek 3900 is a mountain bike that has been designed to meet the needs of both beginners and intermediate riders. In this blog post, we will take a closer look at the Trek 3900 and why it is a top choice for anyone looking for a reliable and affordable mountain bike. We’ll discuss its specifications, features, benefits, and why it’s a great choice for riders of all skill levels.

Table of Contents

Overview of the Trek 3900 Mountain Bike

The Trek 3900 Mountain Bike is a popular choice for professional riders as well as enthusiasts. In this review, we will take a closer look at the features, specifications, and riding experience of the Trek 3900.

  • 1. Design and Build

The Trek 3900 Mountain Bike is constructed using a lightweight and durable Alpha Silver Aluminum frame. It features an SR Suntour M-3030 suspension fork that provides 100mm of travel, making it ideal for off-road riding. The bike comes equipped with Bontrager XR2 tires that offer excellent traction and stability on all types of terrains.

  • 2. Components and Performance

The Trek 3900 Mountain Bike features a wide range of Shimano components, including a 21-speed drivetrain, Shimano Altus shifters, and Shimano M131 front and Acera rear derailleurs. These components work seamlessly together to provide smooth and precise shifting, allowing you to easily adjust your speed and tackle steep inclines.

  • 3. Riding Experience

The Trek 3900 Mountain Bike provides a smooth and comfortable riding experience, thanks to its ergonomic design and high-quality components. The suspension fork helps to absorb shock and vibrations, making it easier to maintain control and balance on bumpy trails. The bike’s lightweight and nimble frame also make it easy to maneuver in tight spaces and navigate technical terrain.

Quote: “The Trek 3900 ticks all the boxes for a great mountain bike – lightweight, durable, and packed with high-quality components. Whether you’re a professional rider or weekend adventurer, this bike delivers a smooth and comfortable ride that will take you places.” – Mountain Biking Magazine.

  • 4. Tips and Recommendations

If you’re looking to maximize the performance of your Trek 3900 Mountain Bike, we recommend investing in a high-quality set of pedals and upgrading to a tubeless tire setup. These upgrades will reduce the weight of the bike, improve traction and stability on the trails, and help you to maintain your speed and control.

Trek 3900 Mountain Guide

trek 3900

Bike Specifications

  • Frame material: Alpha Silver Aluminum
  • Fork: SR Suntour XCT 30, coil spring, preload, hydraulic lockout, 100mm travel
  • Front suspension: SR Suntour XCT 30, coil spring, preload, hydraulic lockout, 100mm travel
  • Wheels: Bontrager Connection, double-wall, 32-hole rims with Bontrager XR2 Comp, 29×2.20″ tires
  • Shifters: Shimano Altus M315, 8 speed
  • Front derailleur: Shimano Altus M313
  • Rear derailleur: Shimano Altus M310
  • Crank: Shimano M315, 36/22
  • Cassette: Shimano HG31, 11-34, 8 speed
  • Brakes: Tektro HD-M276 hydraulic disc brakes, 160mm rotors
  • Handlebars: Bontrager alloy, 31.8mm, 5mm rise, 720mm width
  • Stem: Bontrager alloy, 31.8mm, Blendr compatible, 7 degree
  • Seatpost: Bontrager alloy, 2-bolt head, 31.6mm, 12mm offset
  • Saddle: Bontrager Arvada, steel rails, 138mm width
  • Weight: 31.4 lbs (approximate weight for size medium)

Features of the Trek 3900 Mountain Bike

  • Lightweight frame: The Trek 3900 features a lightweight Alpha Silver Aluminum frame that is both sturdy and easy to handle. The frame coordinates well with the length of your legs, and it has all the components necessary to make your ride smoother and faster.
  • 29-inch wheels: The bigger wheels on this bike help give it a smoother ride over rocky or bumpy terrain. This is the largest size wheel you can get with a Trek 3900 and they provide great traction on uneven surfaces, allowing for better control and handling.
  • Full suspension system: A full suspension system means the bike has a suspension feature both in the front and rear, improving shock absorption and providing more stability. This is an especially useful feature for mountain bikers who want more comfort on rough terrain or tricky descents.
  • Shimano components: The bike boasts Shimano components that make for smoother gear changes while biking off-road,it comes with Shimano Acera M3000 9-speed shifting as well, that can handle the demands of a rugged ride.

💡 key Takeaway

The Trek 3900 Mountain Bike is a top option for those who want to navigate rugged and demanding terrain with ease. With its lightweight frame, full suspension system, and large 29-inch wheels, it guarantees a smooth and enjoyable ride every time.

Comparison Table

For those looking for a reliable, affordable mountain bike, the Trek 3900 is a popular option. Here’s a comparison table to help you evaluate the features and benefits of the Trek 3900 compared to other similar bikes in the market.

As you can see from the comparison, the Trek 3900 stands out for its affordable price, large 29″ wheels, and durable aluminum frame. While other bikes such as the Diamondback Atroz and Specialized Rockhopper offer full suspension, the Trek 3900 still delivers a comfortable ride with its reliable front suspension. Additionally, the Giant Talon has a similar front suspension, but at a higher price point.

Trek 3900 vs other Trek models

Pros and cons of the trek 3900 mountain bike.

When it comes to mountain biking, the Trek 3900 is a popular choice for many. However, before making any purchase, it’s important to consider both the pros and cons of the bike. Here are some of the advantages and disadvantages:

As you can see from the comparison, the Trek 3900 stands out for its affordable price and durable aluminum frame. The Trek Marlin 6, while slightly more expensive, offers similar features and benefits with its Alpha Silver Aluminum frame and front suspension. The Trek Roscoe 6 and X-Caliber 7 are more advanced models with better suspension and higher price points. However, the Trek 3900 still delivers a comfortable ride with its reliable front suspension and large 29″ wheels.

  • Durable: The Trek 3900 is built to last with its durable frame and components.
  • Excellent braking system: Equipped with hydraulic disc brakes, this bike offers excellent stopping power.
  • Smooth ride: With its suspension system, the Trek 3900 provides a smooth ride over rough terrain.
  • Good value: Compared to other mountain bikes in its price range, the Trek 3900 offers great value for your money.
  • Good braking system: The bike’s V-brakes provide strong and reliable stopping power, giving riders the confidence to ride downhill and maneuver around obstacles.
  • Heavier than some other models: At over 30 pounds, the Trek 3900 is heavier than some other mountain bikes which can be a drawback for some riders.
  • Limited color options
  • Parts may need upgrading: Although the bike comes with a decent set of components, some riders may find that certain parts need to be upgraded over time for a better performance.
  • May not be suitable for very technical terrain: The Trek 3900 is better suited for moderate trails and more straightforward terrain compared to highly technical trails..

Things to Keep in Mind while Selecting a Mountain Bike

When selecting a mountain bike, it is critical to evaluate numerous aspects to guarantee that you choose the best option that meets your expectations. The following factors require careful consideration:

  • Frame material: When it comes to a bike’s structure, the frame is critical because it directly affects the bike’s endurance, weight, and overall feel. The materials commonly used to build bike frames are steel, titanium, aluminum, and carbon fiber. Carbon fiber frames are lighter and more rigid, but they are also quite costly. Meanwhile, steel frames are sturdier but weigh more.
  • Suspension: Mountain bikes are equipped with varying types of suspension, which include hardtail, full-suspension, and rigid. While hardtail bikes have suspension on the front wheel only, full-suspension bikes offer both front and rear suspension, and rigid bikes have no suspension at all. Hardtail bikes are well-suited for cross-country rides, while full-suspension bikes are ideal for traversing rough terrains.
  • Wheel size: Bicycles have varying wheel sizes like 26″, 27.5″, and 29″, each with its own advantages and disadvantages. The 29″ is the most popular wheel size among cyclists due to its excellent stability and traction. On the other hand, the 26″ wheel size is perfect for maneuverability, while the 27.5″ option provides a balance of both maneuverability and stability.
  • Brakes: Brakes are an essential component of a bicycle and they are available in various types. Two primary types of bicycle brakes are disc brakes and rim brakes. Disc brakes are more powerful than rim brakes and can operate efficiently in any environmental conditions. On the other hand, rim brakes are comparatively lighter in weight and more cost-effective.

When choosing a mountain bike, factors such as frame material, suspension, wheel size, and brakes must be considered to make an informed decision.

Overall Review of the Trek 3900 Mountain Bike

As an expert, you want to know all the details of the Trek 3900 Mountain Bike before making a purchase decision. This bike stands out for its quality components, excellent suspension, and smooth ride. Here is an overall review of the Trek 3900 Mountain Bike, including subheaders, lists, and quotes to help you make the best decision:

  • Components:

The Trek 3900 Mountain Bike comes with a mix of top-quality components, including Shimano drivetrain, Bontrager tires, and hydraulic disc brakes. These components provide a high-performance rate with smooth shifting, excellent control, and fast braking, making the ride faster and smoother.

  • Suspension:

The suspension available on the Trek 3900 Mountain Bike is a RockShox 30 fork. It easily absorbs bumps and manages tough terrains effectively, providing smooth action while riding. The suspension is adjustable based on rider preference to ensure maximum comfort while riding.

  • Ride Quality:

The Trek 3900 Mountain Bike has a lightweight frame that is made for outstanding performance. It provides faster, smoother rides with more control and stability. The bike’s geometry also makes it easier to handle, making it a great choice for beginner and experienced riders alike.

The Trek 3900 Mountain Bike is an all-around bike that provides a combination of high-quality components and overall great performance. It offers an excellent suspension system and superior ride quality, making it a top choice in the market. Trek 3900 is a solid choice for a beginner mountain bike with its affordable price, durable frame, and good suspension system. However, its weight and limited adjust-ability may not make it the best option for more advanced riders or those looking to customize their bike over time.

💡 key Takeaway: The Trek 3900 Mountain Bike is an excellent choice for beginner and experienced riders who want a smooth ride, high-quality components, and excellent suspension on various terrains.

Yes, the Trek 3900 mountain bike is a good mountain bike. It has a great suspension and a durable frame. The bike has a range of gears that make it easy to ride even on steep hills.

The Trek 3900 mountain bike is a full-suspension mountain bike that is designed for riders who want a bike that is both versatile and hard-hitting. It is made with an aluminum frame that is lightweight and durable, and it has a suspension system that is adjustable. This makes it a great choice for riders who want a bike that can handle a variety of terrain and conditions.

The Trek 3900 mountain bike has a lot of features that make it a great choice for cyclists. It has a Shimano Tiagra drivetrain with a Shimano Deore rear derailleur and shifters, giving you a wide range of gears to choose from. The bike also comes with a Shimano BR-M395 hydraulic disc brake, making it easy to stop on a steep descent. It also has a Shimano hydraulic frame that provides great stability and control while riding.

Conclusion Trek 3900 is a top-of-the-line mountain bike and one of the best on the market. It’s perfect for riders who are looking for a bike that can handle a variety of terrain, from soft snow to hardpack. The bike is also incredibly durable and can take a lot of punishment. The Trek 3900 is a great option for riders who are looking for a bike that will last them for a long time. It’s also one of the most affordable mountain bikes on the market, making it a great option for budget-minded riders. If you’re looking for a bike that can handle a variety of terrain, the Trek 3900 is a great option. It’s also one of the most affordable mountain bikes on the market, making it a great option for budget-minded riders.

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Is Trek 3900 Mountain Bike A Good Bike? [Trek 3900 Review]

Table of Contents

The Trek 3900 is a mountain bike in the Trek 3 series. In 2005, it was only $329.99. It falls under the category of low-cost mountain bikes. But it’s a mountain bike that will be with riders for the next ten years. It is worthwhile to spend the time learning about it.

Trek 3900

In the past, we’ve seen a lot of low-cost bikes put in a lot of effort in terms of price/performance and durability. And the Trek 3900’s durability is unquestionable.

Below, I’ll go over the descents and climbs of this mountain bike, as well as its component features and comparisons to other mountain bikes. Giving you a bird’s-eye view of the Trek 3900.

Trek 3900 bike

To be more specific, the Trek 3900 alpha isn’t a particularly fast mountain bike. It’s designed for normal mountain riding, but because mountain riding can’t be avoided, long descents are included. With only 70mm of fork travel, the Trek 3900 is prone to bottoming out if you come across large rocks or roots on the descent.

The 2.0″ tires deflected easily during the descent, which was a little uncomfortable. The difficulty is further reduced, and the trail’s descending surface is much more comfortable. This is also a once-in-a-lifetime riding opportunity.

The Trek 3900 excels on hill surfaces, and in hilly areas with high and low rolling terrain, gripping the grips can climb small slopes of about 20° very quickly, and with the 3X8 drivetrain, it’s not easy to strain.

It is not always a good experience to want a fast and painful slope; after all, the 26″ tires will always feel a little lacking in transmission when compared to the current 27.5″.

Of course, another important reason is the weight of the body; if you complain about this, you are being unreasonable; after all, it can do more than $300 stacked out of the accessories. As a result, it will only climb on less technically difficult trails.

General pavement

When riding on normal brick-laying or hard-packed surfaces, the Trek 3900 performs reasonably well in comparison to most cheap mountain bikes. The 3X8 drivetrain has a wide enough range of shifts. It’s also very difficult to encounter difficult terrain when riding on city streets.

Trek 3900 Mountain Bike

The park’s wooded areas provide the best opportunity for the Trek 3 series 3900 to perform well, easily passing through cobblestone surfaces or surfaces with some potholes while not interfering with the rider’s ability to ride the entire bike.

The muddy dirt, as long as it’s not too soft and you don’t run out of kinetic energy pedaling, is perhaps the highlight of this mountain bike.

Component Features

Alpha silver aluminium frame.

Trek 3900 alpha aluminum

The Trek 3900 mountainbike is less bulky thanks to the Alpha Silver Aluminium with the semi-integrated head tube, and the double oval downtube with integrated corner stays adds style to the overall design. It is also designed with a greater emphasis on the down tube’s role as a support when climbing ramps.

The slight bulge in the rear insert also allows for larger tire size. A wider 2.2″-2.4″ tire, which is compatible with the Trek 3900 frame, may be considered for more mountain riding. Flat welds have not lost the soul of a good mountain bike.

The 3X8 drivetrain

The older 3X7 drivetrain has fewer gearing options than the 3X8 drivetrain. This is still lagging behind the latest Trek mountain bikes. However, given the asking price, it’s a good value match for the accessories. While many riders consider the Shimano Altus and Shimano Acera M360 to be low-end, they must admit that they are durable.

When it comes to climbing, the right gearing can make or break your ride. In an entry-level mountain bike, a 3X8 drivetrain is still considered a relatively high configuration. The alloy guide wheels, too, don’t feel cheap, and the smooth movement contributes to the ease of use and simplicity.

If you don’t think it’s too much to go after full mountain bike performance, the Trek 3900 drivetrain is a better choice at this price point.

Tektro linear-pull brakes

The Tektro linear-pull brakes are on the low end of the spectrum, and while they are the bike’s mainstay, I couldn’t brake well on fast descents. That is the disadvantage of these brakes.

Of course, if your primary purpose for purchasing it is not strenuous mountain biking, the Trek 3900 brakes are superior. The simple and straightforward rim brakes make riding on flat roads very comfortable, and the mechanical operation and crisp braking that requires some travel also allow you to ride more freely on trails or forest roads. This component isn’t ideal, but with its upgraded Trek 3900 Disc, these annoyances can be avoided.

Fork in the front The Trek 3900 has a fork with only 70mm of travel, the InSync Grind 1. This is adequate for general mountain riding, but not so much when the difficulty level increases. A shock fork with such a short travel is only found on entry-level mountain bikes for youth riding.

And the fork travel on the Trek 820 mountain bike currently on the market is only 75mm, which is slightly more than that but still insufficient for trail riding. As a result, it is appropriate for general trail or rough road riding, and the shock absorption effect of the fork is excellent and will not fail to function.

Tires and wheels

The Bontrager LT3 tires are the same as those used on the Trek 800, which was released at the same time. 26″x2.0″ tires have a greater increase in handling flexibility and provide excellent traction on normal surfaces, but not necessarily in wooded areas after rain.

However, the grip on rough terrain is compromised. Although I prefer wide tires, many Trek 3900 owners have complained about the original size being narrower. Of course, this is upgradeable; as previously stated, it can be the widest and support 2.4″ tires, making your ride on the wet ground a better experience.

Rack and fender mounts

The Trek 3900 can be outfitted with racks and fenders to transform it into a short-distance commuter. Better storage space is required for touring rides. This could be a reason to consider riders who use it primarily for commuting rather than difficult mountain rides.

Other versions of the Trek 3900

Trek 3900 disc.

The original cheap rim brakes have been abandoned in favor of a more cost-effective mechanical disc brake. The rest of the kit doesn’t change much.

Trek 3900 mountain bike Specs

  • How much does the Trek 3900 mountain bike weigh?

Trek 3900 mountain bike has an estimated body weight of 32 lbs (14.5 Kg)

  • What frame sizes are available for the Trek 3900 mountain bike?

There are 13, 16, 18, 19.5, 21 and 22.5″ frames.

  • What is the value of Trek 3900 mountain bike?

The estimate is around $60 when the bike is in relatively good condition.

What do we like about it?

  • Affordable price to make it easier for beginners to get
  • Lightweight aluminum frame
  • 3X8 drivetrain with wider shifting range
  • Rack and fenders can be installed for commuters’ needs

What we don’t like about it?

  • 70mm shock fork, not suitable for intense mountain riding
  • Narrower tires for nimble handling, but some grip is lost

Comparison Table

Trek 820 mountain bike vs trek 3900.

Trek 820

Despite the fact that the Trek 3900 has been discontinued, it still offers more benefits than any other mountain bike in the same price range. I compared the Trek 820 mountain bike to the Trek 3900 here. There are numerous distinctions between them.

The Trek 820 has a steel frame, SR Suntour shock fork with 75mm travel, and a 3X7 drivetrain. They all have the same thing, of course: alloy cable pull brakes and 26×2.00″ tires. The Trek 820 is a good alternative to the Trek 3900. It is slightly heavier by 2 pounds and has a standard 3X7 drivetrain with an extremely loosehead tube angle for comfortable mountain riding.

So, when comparing the two, I prefer the ruggedness of the Trek 820, and its use is more suited to the needs of commuter riders. One of the best sports is perhaps the occasional mountain ride.

Learn more: Is The Trek 820 Mountain Bike Really Suitable For Newbies?

Trek Marlin 6 mountain bike vs Trek 3900

Trek Marlin 6 mountain bike

In terms of accessories, the Trek Marlin 6 is a little more modern than the Trek 3900. Starting with the extremely popular body color scheme, the smooth and clean internal alignment, and the comfortable head tube angle, it is the body design that mountain riders adore.

If you want to become an adventurous everyday rider, the Trek Marlin 6 is ideal. The Trek Marlin 6 has a 100mm (80mm on some frames) travel fork, making it the entry-level shock fork for trail riding when compared to the Trek 3900. There are also safer and more efficient hydraulic disc brakes available, which allow for quick braking with a flick of the finger.

The now-popular 1X10 drivetrain eliminates the obsolete front derailleur chainstay, allowing entry-level riders to ride without feeling the complexity of the setup and be more confident mountain riding and challenging technical trails.

The Trek Marlin 6 costs less than $1000 but outperforms the Trek 3900 in a variety of configurations. The Trek Marlin 6 mountain bike is well worth a look if you want to be an everyday adventurer in mountain riding.

Learn more: Is Trek Marlin 6 Worth Buying? [Trek Marlin 6 Review]

SANTA CRUZ 5010 vs Trek 3900

SANTA CRUZ 5010

The Trek 3900’s configuration leaves avid trail riders tasteless and ready to try a high-end trail mountain bike. In fact, the comparison of these two mountain bikes just made me more conscious of how big the gap is between a professional cross-country mountain bike and a casual “toy”.

With the SANTA CRUZ 5010 Carbon CC X01 Eagle Mountain Bike, you get the Carbon CC frame, VPP Suspension, RockShox Super Deluxe Ultimate Rear Shock, 140mm travel, RockShox Pike Ultimate Fork, 140mm, Front Travel, SRAM G2 RSC 4-piston hydraulic disc brake, and more.

You can learn more by clicking on the links below. With these crushing high-end configurations, your off-road experience is about more than just accommodating the bike’s configuration; it’s about enjoying the entire off-road experience.

You can even compete in off-road and endurance races. If you’re hoping for a race like this, the SANTA CRUZ 5010 might just help you win.

Learn more: Santa Cruz 5010 X01 Review – Napoleon’s Heroism

Final Verdict (4.5/5)

At a low price for entry-level mountain riding needs, the Trek 3900 is a mountain bike stacked with relatively low to mid-range accessories for the time. Able to ride in normal mountain terrain. More than anything else commuter riders would prefer them.

All in all the Trek 3900 is a very good entry-level mountain bike. Rating: (4.5/5)

If you want to see more Trek bikes reviews, follow us as we’ll bring you more evaluations.

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Mountain Bike    •    Product

Trek 3900 Mountain Bike Review

MICHAEL SCOTT    •    24 Oct 2023    •    Comments

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Michael Scott

Owner of Tresna BMX. I'm a Web Developer, BMX Rider and Photographer. I make sure to keep the site looking nice, full of articles and working properly. Affiliate Disclosure

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In this review, we're focusing on the Trek 3900, a mountain bike that has gained popularity for its versatility and affordability. Designed for beginner and intermediate riders, the bike offers a range of features that promise a balanced cycling experience.

We'll delve into the bike's key attributes, from its quality and durability to its weight and price. Each aspect will be scrutinized to provide a well-rounded view of what this bike provides.

By the end of this review, you'll have a comprehensive understanding of the Trek 3900's strengths and weaknesses. This will equip you with the knowledge you need to decide whether this bike is the right fit for your cycling adventures.

Review of: Trek 3900

Uses: Mountain Bike

We Don't Like

___CHANGE___

Trek History and Information

trek mountain bike logo

Founded in 1976 by Richard Burke and Bevil Hogg, Trek Bicycle Corporation has grown from a small Wisconsin-based company into a global leader in bicycle manufacturing. Initially crafting steel touring frames in a rented barn, Trek now distributes its products in over 90 countries worldwide.

Trek has consistently led the way in cycling innovations. They debuted their first bonded aluminum frame with the Trek 2000 in 1984 and launched the industry's first carbon fiber mountain bike, the Trek 9800, in 1992.

The company continued to break new ground with the introduction of the Trek Fuel in 1999, the first full-suspension carbon fiber mountain bike , and the Trek Superfly in 2012, which was the first full-suspension 29er carbon fiber mountain bike.

Pioneering the use of computer technology in bike design and manufacturing, Trek released the first CAD-designed bicycle frame, the Trek 9900, in 1992 and the first CAM-produced frame, the Trek Y-22, in 1995.

Today, Trek's product line is extensive, featuring road bikes, mountain bikes, hybrids, electric bikes, and more. They also own several sub-brands, such as Electra Bicycle Company, Bontrager, and Diamant.

trek 3900 mountain bike

Trek 3900 Review

  • Lightweight Alpha Aluminum frame
  • Versatile for trails and commuting
  • Reliable Tektro disc brakes
  • Customizable with rack mounts
  • Budget-friendly for beginners
  • Limited rear suspension
  • Suntour fork lacks durability
  • Stock tires wear quickly
  • Not suitable for rugged terrains
  • Basic component quality

Entry-Level Appeal

The Trek 3900 is often described as an entry-level mountain bike, but don't let that label fool you. It's packed with features that make it a versatile choice for city commuting and trail riding. The bike's Alpha Aluminum frame offers a lightweight yet durable structure, and its SR Suntour fork provides adequate suspension for a smoother ride.

Performance and Comfort

Regarding performance, the Trek 3900 doesn't disappoint. Its Tektro hydraulic disc brakes offer reliable stopping power, a feature often praised by riders. The bike also scores high marks for its smooth shifting and rigid frame. Comfort is another strong suit, thanks to its ergonomic design and the option to upgrade to disc brakes for better control in muddy conditions.

Customization and Value

One of the standout features of the Trek 3900 is its customizability. The frame has built-in rack and fender mounts, allowing for easy additions based on your riding needs. When it comes to value, the Trek 3900 offers a lot for its price point, making it a popular choice among beginners and those looking for a reliable commuter bike.

While the Trek 3900 offers a lot of positives, it's not without its shortcomings. One of the most notable issues is the stock rear derailleur, which is described as "crappy Acera." This component tends to cause chain slapping and gear leaping when taken off-road, affecting the bike's overall performance.

Another area of concern is the front fork, particularly in the 2007 model that features a Spinner Grinder 1. This fork is criticized for being weak and prone to bottoming out on rough terrains. This limits the bike's versatility and could be a deal-breaker for those looking to tackle more challenging trails.

Lastly, the bike's V-brakes are described as "cheap," prompting some users to upgrade to disc brakes for improved stopping power. While the frame allows for such upgrades, it's an additional cost that potential buyers should consider.

In summary, while the Trek 3900 has its merits, it also has areas that could benefit from upgrades. If you're considering this bike, be prepared to invest in some component upgrades to get the most out of it.

Specifications

  • Frame: Alpha Silver Aluminium
  • Front Suspension SR Suntour XCM
  • Tires: Bontrager LT3, 26x2.0"
  • Shifters: Shimano Altus
  • Front Derailleur: Shimano Altus
  • Rear Derailleur: Shimano Acera
  • Crank: Shimano M171, 42/34/24
  • Bottom Bracket 0
  • Cassette: Shimano HG31 11-32, 8 speed
  • Pedals: Wellgo nylon platform
  • Saddle: Bontrager Evoke 1
  • Seat Post Bontrager SSR
  • Handlebars: Bontrager Low Riser
  • Stem: Bontrager SSR
  • Grips: Bontrager SSR
  • Headset: 1-1/8" threadless
  • Brakeset: Tektro Novela

Pricing and Availability

The Trek 3900 mountain bike was developed and produced in the early 2010s. Since it's no longer widely produced you will unfortunately have to try and purchase one on second-hand marketplaces. I suggest looking on PinkBike or eBay .

We have found a couple of 3900's on eBay for around $500 - $600. If you look around you should find a good deal.

HARDTAIL MOUNTAIN BIKE REVIEW FOR BEGINNERS Trek 3900

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Trek 3900 XC Hardtail

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Frame is absolutely solid

Most components especially the Suntour forks are garbage.

First bike after many many years away from riding. As soon as I bought it, I hooked up with many real MTBers. This bike of course was far below the standards necessary, but it took a tremendous beating along the way. I quickly broke most of the cheapest components and upgraded and replaced them until almost nothing origninal except BB and seatpost clamp were left on the frame. Rockshox Reba RLT and XT components all the way around and finally retired the frame as I upgraded to a BMC carbon Full suspension. I am putting back together to use to ride with the kids around the neighborhood. Overall, it was a great entry level bike to get me back in the sport and outperformed what it was made to do, at least for me.

Similar Products Used:

Awesome frame

Cheap compoments, all bikes should've came with disc brakes. The saddle, and peddals.

Great bike for the price. Haven't really done any hard riding, but overall it feels great. I got the one with V type brakes and made the disc conversion myself and it was fairly easy. I replaced the wheels with lighter disc type wheels, replaced the crankset, pedals, front and rear dérailleurs, shifters, brake levers, grips, and saddle. All I need now is a new fork.

For under $500, you get yourself a lifetime-warranted frame! The newest version has a zero-stack headset, pretty decent components, and disc brakes. The factory components are ok, if you do not ride too much trail or gravity. The bike is upgradable.

Wheels and fork are absolutely rubbish, but that is true across the board at this price.

Nice bike to get you rolling, which you can upgrade as you go. The geometry is friendly and is middle-of-the-road enough to accommodate any riding style.

Diamondback, Gary Fisher, etc.

Price... Even new, the price is pretty good for a mountain bike of reputable quality. It's also upgradable. The bike is built like a tank. I've been ragging on mine for several years now and have done some pretty intense riding with it, and it is still holding together with the original components.

Weight... this is largely due to the front fork and rims. I have upgraded the rims to something lighter and replaced the pedals with shoes... I'll probably upgrade the fork to something lighter in the near future.

A solid bike for a beginner/amateur with plenty of room to grow.

Gary Fisher Marlin

everything but the tires and shifting

Tire rims, gear shifting

This bike is good on the highway. Other than that it is not related for trails. Did a little 180 spin and bent the rim on the bike and i havent even had it for a month sadly. I recommend this bike just for highways. The bike shifts ok it sometimes does skip but doesn't do it to often.

The frame stays in one piece

Everything else

If you want to get serious about mountain biking, avoid the 3-series at all costs. A 4300 is more suitable if you want to get into mountain biking. Otherwise, the best a 3-series such as the 3900 will be good for is the occasional light trail use, but mostly paved bike path use. For those who simply ride casually once in a while. I'm ashamed to call it a mountain bike with the components it has. Most ambitious and adventurous kids will outgrow this bike quickly.

crappy Chinese bikes from department stores

Frame, disc brakes, shifters

Handle bars, fork, pedals, rear derailleur

This is a great entry level bike. I have flat out abused this bike for 3 weeks now and have only had to replace the bars. It does have week components, but I didnt purchase the bike expecting it to perform on the same level as a thousand dollar bike. I bought it to get me started, and I plan on upgrading to better components as the factory ones wear out. All in all you cant ask for much more for the money.

Strong Frame, Smooth, Cheap, Upgradeable platform.

Handle Bars, Stem, Grips are terrible. Rear Derailleur. Seat post slides down a lot.

I have had this bike for 5 years now, I have been riding it abusively as a trail rider for 2 years now. This thing is a battle tank. I did a good bit of modification to it because i can. I love this bike and the only reason for not using it anymore is i am riding a 29er now. This is a great bike for a beginner and will last through some abuse. I am 5'10" and 180 lbs, but the bike would fit someone 6'0" like a glove. I highly recommend new grips and a lighter and shorter replacement for both the stem and handlebar.

The Al frame.

Components, weak fork.

I've been riding my road bike primarily for the last few years and a friend I ride with started to get into single track. I had hoped to find a cheap, decent bike with a broken fork or some other damage that i could fix easily. As it turned out, someone traded this bike to my brother for some work he did. He cannibalized the front wheel, handlebar, tires, and seat. I told him my plan and he gave what was left to me. I was lucky enough to have an old front wheel from my 820 that I used as a stop-gap, found a used 620mm straight bar for 15 bucks, NOS (2009) BB7s for 44 dollars, a Deore RD-M770 for 60, and someone who would trade my wheels for a set of disc wheels that were on a non-disc bike that he was giving away. So, so far, this bike has cost virtually nothing for the quality that I'm left with. I plan on sinking a fair amount of money into a model year or two NOS fork of some kind very soon and it should be about perfect for what I want to do with it. So that is a major advantage of this bike. If it can be had for very little money, it can be upgraded fairly easily! The stock rear derailleur is a crappy acera; when I had it off road the chain would slap like crazy and I even had it leap gears. since the frame can accept disc brakes, I replaced the cheap, cheap V brakes and it stops like a champ now. The front fork is also very weak on the 2007 model that I have (Spinner Grinder 1... I can't even find documentation for this POS) and it bottoms out on virtually anything I do (keep in mind that I have a road bike that i use for just about any road-like riding). Now it shifts and stops like a dream and after I get a fork it should be ideal for anything but racing (it is not a very light bike). It's already been a blast for single track. So, would I recommend it? If you have the money for something better, get it. But if you don't get this and upgrade as you go! If you can get one for free (or very nearly) grab it up and take advantage of the frame. In short, I recommend it, but my recommendation is heavily qualified.

Trek 820, Y33

A good solid bike. If you like hitting the trails a lot but don't really have the budget, this is the bike for you. The fork is good for light trails but it tends to bottom out when the trail gets nasty. The tires are pretty good for both the road and dirt. The bike was actually designed pretty well and most of the components on the bike will definitely do if you are not looking for top performance. If you want to bring out the bike's potential, you might want to consider shelling out an additional $200 or so for upgrade parts.

It's a little heavy for a hardtail. I have a full suspension bike that is a little lighter than this. That says a lot considering hardtails are supposed to be lighter. I have the white version of this bike and dirt sticks to it like anything but that's the price I get for getting anything white, right? Stock brakes are pretty bad so you might want to replace them with at least entry level Shimano brake calipers and discs like the Non-Series BR-M416. That will definitely help with the braking.

It's a pretty good bike. The stock shifters did a pretty good job until I decided to upgrade. The stock brakes are pretty bad. poor stopping power and I constantly had to adjust the setup. I think I would have been better off with rim brakes considering how bad the Promax disc brakes were. I decided to replace the braking system with an entry level hydraulic system from Shimano. That made all the difference. Braking power is fantastic and modulation is all there. Next project is to lighten up my front end by replacing the stock handlebar and stem to carbon fiber parts and perhaps replace the stock suntour front suspension to something with hydraulics. Bottom line is that if you want to get a good bike on a budget, this is the one for you. Shell out and additional $200 for upgrades and I can guarantee that you will be a very happy camper.

Mongoose, Cannondale, Merida and Giant entry level bikes.

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Trek 3900 Alpha Custom Aluminum

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  • Serial: TBI-0406CA4AL700
  • Manufacturer: Trek
  • Name: Trek 3900 Alpha Custom Aluminum
  • Model: 3900 Alpha Custom Aluminum
  • Primary colors: Black and Silver, gray or bare metal
  • Frame size: L
  • Wheel diameter: 26in
  • Frame Material: Aluminum

Distinguishing features

Trek 3900 Alpha Custom Aluminum 16" 40.5cm 26" Tires

Additional parts

Drivetrain and brakes, frame and fork.

  • Derailleur Acera ()
  • Fork Spinner Grind1 ()

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Trek 3700 Mountain Bike Review: Is Trek 3700 worth it?

trek 3900 alpha

If you’re in the market for an affordable and durable mountain bike, Trek 3700 may be a good option for you. But since this bike has been discontinued, you’ll only find used ones. 

In this review, we’ll take a closer look at the features that make the Trek 3700 stand out from the competition. 

The Trek 3700 mountain bike has a lightweight Alpha aluminum frame and hardtail design, which is great for beginners who want a reliable ride on the trails. 

Keep reading to find out why the Trek 3700 is a great choice for anyone looking for a quality mountain bike without breaking the bank.

Trek 3700 Mountain Bike At A Glance

trek 3900 alpha

Trek 3700 is a hardtail mountain bike with a lightweight and sturdy Alpha aluminum frame, which makes it easy to handle. With an 8-speed Shimano drivetrain and powerful disc brakes, this bike offers great versatility on all types of terrain. 

The front suspension provides excellent balance and stability on rougher roads or trails, ensuring smooth rides. Plus, the Bontrager LT3, 26×2.0″ tires are of excellent quality, making it a reliable choice. If you ever need to replace them, you can do so with ease. 

3700 Trek is the perfect combination of affordability and quality, making it a great choice for beginner riders looking to hit the trails.

  • Very versatile bike
  • Lightweight and durable frame
  • Easy to upgrade
  • Quality components
  • Seat is stiff and fork is rigid
  • Not great for very rough trails

Unfortunately, this bike has been discontinued, but Trek has impressive newer models with better designs which are excellent alternatives to the 3700 Trek mountain bike. 

We recommend Trek Marlin 5 and Trek Fuel EX 5 as great alternatives, you can scroll down to see our brief review of these bikes. 

Trek 3700 Mountain Bike Review: Features and Specifications

Frame and fork.

The frame and fork of the Trek 3700 Mountain Bike strike an excellent balance between durability, comfort, and versatility, making it a great choice for both beginner and intermediate riders who want an affordable and reliable mountain bike.

The Trek 3700 Mountain Bike is made of Alpha Silver Aluminum, which is known for its lightweight and durability. The semi-integrated head tube on the frame adds to its sleek design, while the rack and fender mounts make it a versatile option for both commuting and off-road adventures.

trek 3900 alpha

The bike’s rigid fork and geometry make it similar to today’s hybrid bikes, providing a comfortable and stable ride. As a hardtail mountain, Trek 31700 has only a front suspension. And the coil suspension front fork with 100mm travel does a good job of absorbing bumps and vibrations, which improves the bike’s comfort level.

While the front fork’s coil suspension design adds weight to the bike, it’s a small price to pay for a smoother ride. The inner layer of metal within the coil spring absorbs bumps and shocks, while the outer layer of rubber resists movement and compression, keeping you in control and enjoying a comfortable ride.

Gears and Brakes

The Trek 3700 Mountain Bike’s gears and brakes are built for quality and performance. With Shimano C051 shifters, Shimano Altus M310 8-speed front derailleur, and Shimano Altus M280 rear derailleur, you’ll have a reliable and smooth gear system to take on any terrain.

The 2015 Trek 3700 Disc comes with Tektro M290 hydraulic disc brakes, which provide incredible stopping power, giving you the confidence to take on steep hills and rough trails. With these brakes, you can stop quickly and precisely, even in wet or muddy conditions.

trek 3900 alpha

The Bontrager LT3 tires and Shimano 8-speed gearing provide excellent grip and versatility on flat terrain, allowing you to ride comfortably and efficiently. Most Trek 3700 models have a 21-gear, 3×7-speed drivetrain, depending on the model. Some had a 3×8 speed gearing, though. 

The Trek 3700 Mountain Bike’s rim and disc brakes offer great stopping power, with the disc brakes being the more effective option in rougher conditions. They are lightweight, reliable, and powerful, providing maximum stopping power in all conditions and terrain.

This Trek bike also features a Shimano M131 chainguard to protect the chains, ensuring your safety when riding on trails and providing extra protection against debris and obstacles.

Trek 3700 Mountain Bike’s gears and brakes, paired with its high-quality components, make it an excellent choice for riders looking for a reliable and versatile mountain bike. Whether you’re hitting the trails or commuting to work, this bike is built to handle whatever you throw at it.

Wheels and Tires

The Trek 3700 Mountain Bike’s wheels and tires are designed to handle a variety of terrains, from paved roads to rough trails. 

The 26-inch wheels are more agile and accelerate faster than larger wheels, making them great for riders who value speed and maneuverability. But not so great for rolling over bumps on rough trails. 

trek 3900 alpha

The Bontrager LT3 tires are 26 x 2.00 inches in size and are designed for both path and trail use. They’re sturdy and puncture-resistant, so you don’t have to worry about puncture or damage to your tires when exploring new trails. 

These tires provide excellent grip and stability on challenging terrain, giving you the confidence to tackle even the toughest trails. What’s more, these tires are easy-rolling on city streets and paved roads, so you can ride smoothly and efficiently. 

The Trek 3700 Mountain Bike’s Bontrager LT3 tires give you the performance and reliability you need to ride with confidence whether you’re riding to work or hitting the trails.

Saddle and Handlebars

The Bontrager Approved stem is also an excellent addition to the Trek 3700. It’s made from lightweight and strong 6061-T6 aluminum alloy, making it both durable and long-lasting. 

As you’d have guessed, the saddle is not very comfortable, it’s a bit too stiff, so you’d need an upgrade there. But the 31.6mm seatpost offers plenty of room to adjust the bike to your size and grow with it over time, which is great.

trek 3900 alpha

The handlebars are quite impressive, the bar’s robust design can withstand some abuse while being used on the trail. Its handlebar’s 25.4mm diameter and 30mm rise give it plenty of space for a comfortable grip when riding.

This stem has a 25.4mm clamp diameter and a 25-degree rise, providing a comfortable riding position while also keeping you in control of your bike. The stem’s four-bolt faceplate design also ensures a secure fit, so you can focus on the trail instead of worrying about your handlebars coming loose. 

Actually, the combination of the Bontrager Riser handlebar and the Bontrager Approved stem on the Trek 3700 makes for a comfortable and stable ride, no matter where you choose to take it.

Size and weight

The Trek 3700 is a versatile bike that comes in multiple sizes to fit a variety of riders.

It comes in a wide range of frame sizes, so you can find a good fit for almost anyone, whether you’re a petite rider looking for a 13″ frame or a bigger cyclist with wider shoulders looking for a 22.5″ frame.

It’s also important to note that the weight of the bike is around 32lbs (14.5 kg), which is pretty high due to the suspended front fork adding weight. 

So, this might not be the ideal choice for you if you’re looking for a lightweight bike. But the bike is sturdy enough to support riders that weigh up to 300 lbs, so you don’t have to worry about your weight breaking the bike.

Ride quality and performance

Trek 3700 is a mountain bike that’ll give you comfortable trail rides and excellent performance for an affordable price. It’s a great bike for those who want a smooth ride and good performance without breaking the bank. 

The suspension system helps to absorb shock and provides tame rides on both smooth and rough terrain. The bike also has excellent handling and stability, making it easy to maneuver and control. It rides smoothly, and brakes efficiently. 

trek 3900 alpha

If you’re a beginner or intermediate rider, the Trek 3700 is an excellent choice. It has a sturdy frame that can handle a lot of stress and weight, so you don’t have to worry about breaking it. Plus, it’s easy to ride and steer, so you can focus on enjoying the ride instead of struggling to stay upright. 

The bike’s components are of high quality and durable, so you don’t have to worry about them wearing out quickly. The brakes are responsive, and the gears shift smoothly and easily. And while the bike may be a bit heavy, it doesn’t affect the ride quality or performance. 

However, this is not the best bike for very technical trails, as you may need more range of gears for some climbs and descents. It’s best suited for testing your limits on beginner-friendly mountain trails, and fine-tuning your mountain biking skills. 

Best 3700 Trek Mountain Bike Alternatives

Since Trek 3700 mountain bikes are off the shelf, you won’t find brand-new ones. But there are more advanced Trek trail bikes with even better build quality and performance. 

Trek is a brand known for the quality bikes they put out, these bikes are often priced high though, not like the cheaper options from Schwinn and Mongoose, but you certainly get what you pay for. 

We consider the Trek Marlin 5 and Trek fuel EX 5 to be excellent alternatives to the Trek 3700 mountain bike. 

Trek Marlin 5

trek 3900 alpha

Trek Marlin 5 is a trail mountain bike that’s built to gracefully handle daily adventures on rough terrains. It has a lightweight aluminum frame with a 2×8 drivetrain for smooth riding and shifting and powerful hydraulic disc brakes which provide fast and precise stopping. 

While the Marlin 5 is made for trail riding, it’s also versatile and can double as a commuter bike. This bike has a stunning frame with internal routing for the brake and shift cables, which can extend the lifespan of your wires by shielding them from the environment.

It’s the perfect bike for new trail riders and comes in seven frame sizes to fit riders of all heights. Marlin 5 is elegant and comfortable, with a ton of features that are typically reserved for more pricey bikes.

Trek Fuel EX 5

trek 3900 alpha

Fuel EX 5 is a very efficient full-suspension trail bike that’s ready to handle the most rugged mountain terrains. It’s built for speed, with a sturdy chassis and supportive front and rear suspension to give you loads of support on both climbs and descents.

The Trek Fuel EX 5 stands out as a high-value, high-performance mountain bike with remarkable adaptability. It’s fitted with a Shimano 1×12 drivetrain, a dropper post for getting low on descents, and hydraulic disc brakes.

As a heavy trail-rider, this bike most likely checks all the boxes on your wishlist for a new bike. It’s a sure-footed bike that delivers better stability and control. And more importantly, it’s a fun bike to ride. 

Is 3700 Trek Mountain Bike a good buy?

Trek 3700 mountain bike is a good buy and offers great value for money. It’s a reliable and flexible option for both beginner and experienced riders. 

It may not have all the aesthetic features of newer mountain bikes, but it still has many good features, meaning that it’s a wise investment for anyone looking for an affordable, durable, and high-quality mountain bike. 

You likely won’t find a brand-new Trek 3700, but the alternative options we included above are great choices too.

You may also like:

  • Best Mountain Bikes for $1500
  • Schwinn S29 Mountain Bike Review

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Trek 3700 Review: Is It a Good Bike or Waste of Money?

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Trek 3700 is a mountain bike sold between 2004 and 2015. It gained huge popularity over the years. The question is: Is it a good bike?

KEY TAKEAWAY

One of the highlights of the Trek 3700 is its suspended front fork with a 100mm travel that improves riding comfort by absorbing bumps and vibrations. Additionally, the aluminum frame is sturdy yet lightweight. It also has a relaxed geometry for a comfortable, upright riding position, which is ideal for short trips or commuting.

Let’s now scrutinize this bike more in-depth.

Is Trek 3700 a Good Bike?

Trek 3700 was a popular bike thanks to its excellent price-value ratio. Many people decided between the 3700 and Trek 4300 , which had better specs.

They tended to lean toward the 4300 because its specifications were better for a relatively small price increase (~$90).

Trek 3700 in front of a garage door.

Trek 3700’s MSRP increased from around $280 to around $410 in 2010. ( Source ) It is not officially sold anymore, so you must buy it second hand.

The 3700 was available in multiple sizes ranging from smaller ones for kids to larger ones suitable for adults (13, 16, 18, 19.5, 21, 22.5″…).

It was available in multiple colors and with rim or disc brakes , depending on the model year.

Pros and Cons of Trek 3700

Here, I summarized the pros and cons of Trek 3700.

Pros of Trek 3700

  • Quality and sturdy aluminum frame
  • Suspended front fork
  • Available for men and women
  • Comfortable geometry, allowing upright riding position

Cons of Trek 3700

  • 26-inch wheels
  • 3X drivetrain (2X and 1X became more popular thanks to their simplicity)
  • Rigid front fork

To fully understand the pros and cons, I recommend reading the following section, where I compare its features with those of today’s mountain bikes.

Main Features of Trek 3700

Below, I evaluate the main features of the Trek 3700.

Aluminum Frame

All Trek 3700 bikes are based on Alpha aluminum frames.

Aluminum is relatively lightweight and affordable yet durable. That’s why it’s so popular as a bike frame material .

Detail on the Trek 3700 frame size.

However, the overall weight of the Trek 3700 is around 14.5 kg (32 lbs), which is pretty high.

This is mainly because the suspended front fork adds a lot of weight. Remember, the Trek 3700 disc brake version is heavier than the rim brake version.

But you don’t have to fear putting this bike under much stress. It will handle everything you throw at it because of its durability.

26-Inch Wheels

Like most old-school mountain bikes, the Trek 3700 came with 26-inch wheels.

Detail on the Trek 3700 rear 26″ wheel.

Those are more agile (meaning they accelerate faster) but less stable and comfortable than the 27.5 or 29-inch wheels used today.

If you can, I recommend trying bikes with different wheel sizes, so you experience the difference.

Trek 3700 was equipped with a combination of Shimano, SRAM, Bontrager, and other 3rd party components.

Detail on the Trek 3700 saddle and seatpost.

Considering today’s standards, its handlebar was narrow, and the saddle was pretty wide.

Depending on the model, most Trek 3700 had a 3×7spd drivetrain, offering 21 gears. Some, however, had a 3×8spd gearing.

Today’s mountain bikes usually come with 2X or 1X drivetrains. This is because of their simplicity, lower weight, and less chance of cross-chaining.

On the other hand, the Trek 3700 was similar to today’s hybrid bikes because of its rigid fork and geometry. Those still use 2X or 3X drivetrains, offering a wide gear range for various terrains.

Suspension Fork

One of the main features of the Trek 3700 is the coil suspension front fork. It has 100mm travel that absorbs bumps and vibrations, making the ride more comfortable.

Its drawback is that it increases the overall weight of the bike. Models like the Trek 800 are lighter because their front fork is rigid.

Trek 3700 was sold with rim and mechanical disc brakes. The rim brakes are lighter but less effective than disc brakes in rougher conditions.

Deatil on the Trek 3700 front disc brake.

Disc brakes are known for their better effectiveness, for example, in the rain. So, if you are a heavier rider, prefer models with disc brakes.

Trek 3700 Specifications

Below, I summarize the most important technical specifications of Trek 3700. Remember, they differ based on the year:

  • Frame material: Aluminum
  • Weight: ±14.5 kg (32 lbs) depending on frame size, brakes, and year made
  • Wheel size: 26-inch
  • Brakes: Rim or disc
  • Groupset: Shimano Altus
  • Gears: 3×7spd or 3×8spd
  • Colors: Differ based on the year

Although the Trek 3700 has been discontinued for several years, it still has a place among beginners and undemanding riders.

It was a popular mountain bike because of its quality aluminum frame, front suspension, and wide enough gear range.

You can buy it for around $150 in mint condition from people who tried it but have never ridden it frequently. Check out Craigslist or eBay.

If you want to spend more on an up-to-date mountain bike from Trek, check out their website.

Trek 3700 FAQ

Trek 3700 is still worth it today if you are looking for a cheap mountain bike. It was already discontinued, so you can only buy it second-hand. Aim for a price of around $150 for mint condition.

Trek 3700 was made between 2004 and 2015.

Trek 3700 weighs ±14.5 kg (32 lbs). Its weight differs based on its size and year made. Remember, the rim brake version is lighter than the disc brake version.

Trek 3700’s weight limit is 300 lbs (136 kg).

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trek 3900 alpha

  • Crosscountry
  • Rider Notes

2005 Trek 3900

trek 3900 alpha

A 26″ aluminum frame crosscountry bike with modest components and rim brakes.

For This Bike

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A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

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Last updated June 29 Not listed for 2,501 days

IMAGES

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  3. Trek Alpha 3900 Mountain Bike.

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  6. Trek 3900 Mountain Bike 26" Wheel 16" Alpha Aluminum Frame, 24 Speed #

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VIDEO

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COMMENTS

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    Trek 3900 Disc XC Hardtail user reviews : 4.5 out of 5 - 4 reviews. Read it's strength, weaknesses, find deals and pricing - mtbr.com ... Alpha White Aluminum w/semi-integrated head tube, bi-oval down tube w/integrated gusset, rack & fender mounts, disc compatible dropouts, replaceable derailleur hanger ... crash this bike very hard or anything ...

  10. Trek 3900 Mountain Bike Review

    The Trek 3900 is often described as an entry-level mountain bike, but don't let that label fool you. It's packed with features that make it a versatile choice for city commuting and trail riding. The bike's Alpha Aluminum frame offers a lightweight yet durable structure, and its SR Suntour fork provides adequate suspension for a smoother ride.

  11. Trek 3900 XC Hardtail

    Trek 3900 XC Hardtail user reviews : 3.9 out of 5 - 48 reviews. Read it's strength, weaknesses, find deals and pricing - mtbr.com ... Alpha Aluminum; Front Suspension; USER REVIEWS . Next 10. Showing 1-10 of 48 [Aug 07, 2014] ... the best a 3-series such as the 3900 will be good for is the occasional light trail use, but mostly paved bike path ...

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  14. Trek 3900 Alpha Custom Aluminum

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  15. 2008 Trek 3900

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  21. 2005 Trek 3900

    Rims: Alloy front, Shimano RM30 rear hub; Matrix 550 rims. Tires: Bontrager Connection Trail, 26x2.0"