Trek FX Sport SL 4 Bike 2026 Matte Onyx Carbon
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Hit the road with the Trek FX Sport SL 4, a carbon fiber bike that blends the speed of a road bike with the stability and comfort of a flat handlebar. Its 1x drivetrain keeps your ride simple, smooth, and worry-free, whether you're crushing solo rides or flying with the group.
Built with Trek’s 400 Series OCLV carbon, the FX Sport SL 4 delivers responsive acceleration and confident handling. Shimano CUES with LINKGLIDE technology ensures long-lasting, precise shifting, while thoughtful geometry and ergonomic Bontrager components keep every mile comfortable and controlled.
Key Features
- Frame: 400 Series OCLV Carbon, internal routing, 3s chain keeper, DuoTrap S compatible, mudguard mounts, flat-mount disc, 135x5 mm ThruSkew
- Fork: Carbon, hidden fender mounts, flat mount disc, 100x5 mm ThruSkew
- Shifter: Shimano CUES U6000 w/optical gear display, 10 speed
- Rear Derailleur: Shimano CUES U6000 GS
- Crank: Prowheel alloy, 42T narrow-wide ring, 175 mm length
- Cassette: Shimano CUES LG300, LINKGLIDE, 11-48, 10 speed
- Chain: Shimano LG500
- Pedal: Bontrager City pedals
- Max Chainring Size: 44T
- Hub Front: Formula CL-51 alloy, 100x5 mm
- Skewer Front: 135x5 mm bolt-on
- Hub Rear: Formula CL-52 alloy, 135x5 mm
- Skewer Rear: 169x5 mm bolt-on
- Rim: Bontrager Paradigm, Tubeless Ready, 32-hole, 21 mm width, Presta valve
- Tire: Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700x40c
- Max Tire Size: 42 mm without fenders, 40 mm with fenders
- Saddle: Bontrager H1
- Seatpost: Bontrager alloy, 27.2 mm, 12 mm offset, 330 mm length
- Handlebar: Bontrager Satellite Plus IsoZone, alloy, 31.8 mm, 15 mm rise, 600–660 mm width depending on size
- Grips: Bontrager Satellite IsoZone Plus, lock-on, ergonomic
- Stem: Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 90–110 mm length depending on size
- Brake: Shimano hydraulic disc, MT201 lever, UR300 caliper
- Brake Rotor: Shimano RT10, CenterLock, 160 mm front & rear
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