Trek 3700 Review: Is It a Good Bike or Waste of Money in 2023?

Is Trek 3700 a good bike? Trek 3700 in front of a garage door with custom graphics.

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Trek 3700 is a mountain bike sold between 2004 and 2015. It gained popularity over the years.

The question is:

Is Trek 3700 a good bike?

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, 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 were deciding 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.
Blue/black Trek 3700 in a mint condition

Trek 3700’s MSRP increased from around $280 to around $410 in 2010. (Source) It is not officially sold anymore, so you will have to browse some online marketplaces if you want to buy it.

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″…).

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

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 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.
Trek 3700 was made in multiple frame sizes, including a step-through option

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 disc brake version of the Trek 3700 is heavier than the rim brake version.

But, you don’t have to be afraid of putting this bike under a lot of 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.
26″ rear 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.
Bontrager saddle on the Trek 3700

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


Depending on the model, most Trek 3700 came with 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, Trek 3700 was pretty 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 can absorb bumps and vibrations, contributing to a more comfortable ride.

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.
Front disc brake
Detail on the Trek 3700 rear wheel and rear disc brake.
Rear 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

Trek 3700 FAQ


Trek 3700 is already discounted for several years, but it still has its 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 are willing to spend more on an up-to-date mountain bike from Trek, check out their website.

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