The 2021 Trek FX Sport Carbon 4 is a 700c carbon frame fitness bike with high-end components and hydraulic disc brakes.
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1 × 11 — 11 speed
The FX Sport Carbon 4 is geared about the same as similar bikes for riding up hills.
The FX Sport Carbon 4 won‘t keep up with similar bikes while riding downhill or sprinting.
Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more. Learn more
Frame | 400 series OCLV carbon, IsoSpeed, internal routing, 3s chain keeper, DuoTrap S compatible, fender mounts, flat mount disc, 142x12mm thru axle |
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Fork | FX Carbon, threadless alloy steerer, hidden fender mounts, flat mount disc, 405mm axle-to-crown, 100x12mm thru axle |
Bottom Bracket | Shimano BB71, 86.5mm, PressFit |
Headset | 1-1/8'' threadless, sealed cartridge bearings |
Stem | Bontrager Elite, 31.8mm clamp, Blendr compatible, 7 degree, 100mm length |
Handlebar | Bontrager Satellite Plus IsoZone, alloy, 31.8mm, 15mm rise, 660mm width |
Saddle | Bontrager H1 |
Seatpost | Bontrager alloy, 27.2mm, 12mm offset, 330mm length |
Grips | Bontrager Satellite IsoZone Plus, lock-on, ergonomic |
Rear Derailleur | Shimano GRX RX812, long cage, 42T max cog |
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Crank | Shimano GRX RX600, 40T ring, 175mm length |
Shifters | Shimano RS700, 11 speed |
Cassette | Shimano SLX M7000, 11-42, 11 speed |
Chain | Shimano HG601 |
Brakes | Shimano MT201 hydraulic disc, flat mount, 160mm rotor |
Rims | Bontrager Tubeless Ready Disc, 32-hole, presta valve |
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Spokes | 14g, stainless steel, black |
Front Hub | Formula alloy, centerlock disc, 100x12mm thru-axle |
Rear Hub | Shimano RXC400, centerlock, Shimano 11-speed freehub, 142x12mm thru axle |
Tires | Bontrager R1 Hard-Case Lite, wire bead, 60 tpi, 700x32c |
Disk Rotors | Shimano RT10, centerlock, 160mm |