Trek FX Sport SL 4

FX Sport SL 4 is the carbon fitness bike designed for those who want the speed of a road bike without giving up the secure control of a flat handlebar . Light, responsive and snappy, it is ideal for anyone looking for a fast bike for training, sporty commuting and group rides .

The high-performance carbon frame absorbs vibrations and lets you ride longer with less fatigue, while the all‑day comfort geometry – with a slightly shorter reach and higher stack – offers a more upright, stable and natural position, perfect even for those who spend many hours in the saddle.

The 1x drivetrain ensures simple, intuitive shifting, with no front derailleur but a wide range of gears to safely tackle challenging climbs, fast sections and mixed routes . Fewer controls, more fun and focus on the ride.

FX Sport SL 4 is the ideal choice for anyone who wants a fast, lightweight and comfortable fitness bike , perfect for improving fitness, increasing average speed and enjoying every ride with the feel of a real road bike, but with the easy handling of an advanced city bike.

TECHNICAL SPECIFICATIONS

FRAMESET

• Frame:400 Series OCLV Carbon, internal cable routing, 3S chain keeper, DuoTrap S compatible, mudguard mounts, flat-mount disc brake, 135x5 mm ThruSkew.

• Fork: Carbon, hidden fender mounts, flat-mount disc, ThruSkew 100x5mm

WHEELS

• Rims: Bontrager Paradigm, Tubeless Ready, 32-hole, 21mm width, Presta valve 

• Hubs:

  • Front: Formula CL-51 alloy, 100x5mm

  • Rear: Formula CL-52 alloy, 135x5mm

• Tyres: Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60tpi, 700x40mm

DRIVETRAIN

• Pedals: Bontrager City pedals

• Crankset: Prowheel alloy, 42T narrow‑wide chainring, 175mm length

• Chain: Shimano LG500, 9/10/11 speed // KMC X Glide, 11‑speed, Gray

• Cassette: Shimano CUES LG300, LINKGLIDE, 11‑48, 10‑speed

• Rear Derailleur: Shimano CUES U6000 GS

COMPONENTS

• Saddle: Bontrager Commuter Comp

• Seatpost: Bontrager alloy, 27.2mm, 12mm offset, 330mm length

• Handlebar:

  • S - XS : Bontrager alloy, 31.8mm, 15mm rise, 600mm width
  • L - M - XL : Bontrager alloy, 31.8mm, 15mm rise, 660mm width

• Grips: Trek ergonomic PRO, lock‑on // Trek ergonomic PRO, lock‑on

WEIGHT

• Weight: M – 10.90 kg / 24.04 lbs
• Weight Limit: This model has a maximum total weight limit (combined weight of the bicycle, rider, and cargo) of 136 kg.

The manufacturer reserves the right to make changes to the product information on the website at any time without notice, including details relating to equipment, specifications, models, colours, materials and prices. Due to supply chain issues, compatible parts may be substituted at any time without notice.