Trek FX Sport 4


SKU: 35785 Category:


FX Sport 4 is a carbon fibre fitness bike for riders who want the speed of a lightweight road bike with the comfort and control of a flat handlebar. The 1x drivetrain simplifies shifting without sacrificing gear range, making this high-performance bike perfect for everything from solo workouts to speedy group rides.

You’re ready to log big miles, and you prefer the feel of a flat handlebar to the drop bars that come stock on most road bikes. You prioritise comfort and performance equally, and want the simplicity that a 1x drivetrain provides.

A lightweight 400 Series OCLV Carbon frame and fork, a Shimano Deore 1x drivetrain with a wide-range cassette, Shimano hydraulic disc brakes for all-weather stopping power, a lightweight tubeless ready wheel set, wide, fast-rolling Bontrager GR1 Expert gravel tyres and a vibration-absorbing handlebar and ergonomic grips.

Fast, capable, comfortable. This bike has a road -smoothing carbon frame and quality parts that will hold up over serious miles, including the simpler-shifting 1x drivetrain.
– The 1x drivetrain delivers a wide range of gearing with the simplicity of a single shifter
– You get the superior ride quality of carbon without the bank-breaking price
– On your left, roadie! This fitness bike is more than capable of taking on speedy group road rides
– It’s easy to accessorise with mudguards, lights and more!

Make it your own
Customise your bike with fenders, racks, bottle cages and more to make it your own.

1x drive train
A 1x drivetrain means more versatility, simpler shifting and fewer things to go wrong. You still have a wide range of gears, but with lighter and more intuitive shifting. Everything you need and nothing more.

Just-right geometry
The all-new FX Sport has slightly less reach and slightly more stack than previous models for a more comfortable yet active and fast riding position.

400 Series OCLV
Ultra high performance, within reach. The areal weight range and modulus mix of 400 Series OCLV provides an exhilarating sense of acceleration and confident handling.

Additional information


Size XS – 10.74kg


Carbon, hidden mudguard mounts, flat mount disc, 5×100 mm thru-skew


Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 90 mm length


KMC X11, 11-speed // KMC X11, 11-speed


400 series OCLV Carbon, internal routing, 3s chain keeper, DuoTrap S compatible, mudguard mounts, flat mount disc, 135×5 mm ThruSkew


Shimano Deore M5100, long cage, Shadow Plus


Bontrager City pedals


Bontrager H1


Bontrager alloy hubs and Paradigm Comp rims
Bontrager Paradigm, Tubeless Ready, 32-hole, 21 mm width, Presta valve
Formula CL-51 alloy, 100×5 mm QR
Formula CL-52 alloy, 135×5 mm QR


Shimano Deore M5100, 11-51, 11-speed


Prowheel alloy, 42T narrow-wide ring, 175 mm length


Bontrager alloy, 27.2 mm, 12 mm offset, 330 mm length


Shimano Deore M5100, 11-speed


Bontrager Satellite Plus IsoZone, alloy, 31.8 mm, 15 mm rise, 600 mm width

Front brake

Shimano hydraulic disc, MT201 lever, UR300 calliper // Shimano hydraulic disc, MT201 lever, UR300 calliper
Shimano RT10, CenterLock, 160 mm
Max brake rotor size

Derailleur rear

Shimano Deore M5100, long cage, Shadow Plus

Bartape or grips

Bontrager Satellite IsoZone Plus, lock-on, ergonomic //

Primary rear brake

Shimano hydraulic disc, MT201 lever, UR300 calliper // Shimano hydraulic disc, MT201 lever, UR300 calliper
Shimano RT10, CenterLock, 160 mm
Max brake rotor size

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