Trek FX 1 vs. 2 vs. 3 and FX Sport 4 vs. 5 vs. 6 Compared: Which One to Choose?

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In this article, I’ll help you navigate the Trek FX hybrid bike family by comparing the FX 1, 2, 3, and FX Sport 4, 5, and 6.

You’ll learn about the differences between each model, who they are best suited for, and more. 

Plus, I’ll tell you which model gives you the best value for your money to help make your decision easier.

Trek FX 1 vs. 2 vs. 3 and FX Sport 4 vs. 5 vs. 6

The following table summarizes the main differences between all FXs and FXs Sport, Trek’s hybrid bike families.

FX (Sport) Pros & Cons Summary

I summarized the pros & cons of the FX (Sport) series below.

FX Main Features

Let me now explain the most important features of the Trek FX and FX Sport bikes and compare these two families.

Frame and Geometry

All FX bikes come with an aluminum frame, available in XS-XXL sizes, but with forks made of different materials – steel, aluminum, or carbon.

FX Sport bikes have a high-end carbon frame with a carbon fork, resulting in lower weight and better riding comfort due to carbon’s ability to absorb road vibrations.

Their geometry also differs slightly. Despite the name suggesting a more performance-oriented geometry, the FX Sport is surprisingly more relaxed, allowing you to sit more upright.

The geometry of both FX families is relaxed enough for less flexible riders and those who prefer comfort over the speed that comes from a more aggressive, and therefore more aerodynamic, stance.

Finally, it is important to add that FX bikes are also available in a step-through version suitable for women. FX Sport bikes are not.

Wheels and Tires

The wheel size on FX bikes is the same as on most hybrid bikes – 700c – but with wider tires than those used on road bikes, ranging from 32 to 40mm. The tire clearance is up to 45mm.

The tires have a pattern to provide increased traction on light gravel or dirt roads but are not suitable for demanding terrain like mountain bike tires.

Remember that some models have tubeless-ready wheels but don’t come with tubeless-ready tires, so you may need to swap them later if you want.

Also, the higher-end the bike, the better the wheels. For example, the Trek FX Sport 6 has carbon Bontrager wheels that are lighter, stiffer, and a bit faster than the aluminum ones.

Groupset

While the FX family offers a wider range of gears thanks to 2X and 3X drivetrains, the FX Sport has a narrower gear range due to the 1X drivetrains.

1X drivetrains are popular because they are easy to maintain and shift and lighter than 2X or 3X groupsets.

However, their disadvantage is a smaller gear range. So, depending on the terrain you often want to ride, you may occasionally miss some gears. On the other hand, you don’t have to worry about cross-chaining.

Brakes

Although the FX series offers entry-level models with rim brakes (which are also a bit cheaper), the industry’s pressure has pushed for disc brakes.

Disc brakes are more effective, especially in the rain, as they do not lose their braking power. The debate between supporters and opponents of disc and rim brakes seems endless.

All FX bikes, except for one model, use hydraulic disc brakes. Check out this article for the differences between mechanical and hydraulic disc brakes.

Since hybrid bikes often don’t require as much braking power as mountain bikes, you can rely on sufficient stopping power for all the used brakes.

Extras

Another difference between FX and FX Sport is cable routing. On Trek FX, it is partially integrated, while on FX Sport, it is almost completely integrated, including the area around the handlebars, simplifying and improving the overall appearance.

All FX and FX Sport bikes are compatible with the DuoTrap S sensor, sold separately, which measures your speed, distance, and more. You can pair it with a speedometer or bike computer.

FX frames have mounts for kickstands and racks, making it easy to install these accessories. You can also leverage the Blendr stem to easily attach compatible accessories from the Trek/Bontrager ecosystem.

Lastly, most FX bikes come with slip-on grips, while all FX Sport models have lock-on grips that are easier to install and replace than slip-on grips. FX Sport bikes also use better IsoZone grips that are more comfortable and alleviate the pressure on your hands.

Trek FX FAQ

My Verdict

So, which bike should you choose between Trek FX and Trek FX Sport? And which bike from each family is the best?

If you’re on a tighter budget and looking for an affordable bike for commuting and leisure riding, then go for Trek FX. These bikes are mostly sufficient for beginners.

Trek FX Sport bikes are more expensive due to their carbon frames, which result in much lower weight. They resemble road bikes with flat handlebars and are suitable for those looking for a lightweight and comfortable hybrid bike. Just remember that their gear range is more limited.

I believe the FX 2 Disc provides the best value for the money from the FX family. First, you avoid an obsolete 3X drivetrain on the FX 1 Disc. Then, you get hydraulic disc brakes, significant weight reduction, and better components. While the price difference between the FX 2 and FX 3 is relatively large, the added value is not as significant.

The best bike from the Trek FX Sport family is the mid-range FX Sport 5 Disc, as it uses a simple 1X drivetrain and is much lighter than the FX Sport 4.

While the Trek FX Sport 6 is much lighter, mainly due to the carbon wheels, it is also much more expensive.