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2021 Trek FX Sport Carbon 4
FX Sport 4 is a carbon fiber fitness bike for riders who want the speed of a lightweight road bike with the comfort and control of a flat handlebar. An IsoSpeed decoupler smooths out rough roads and the 1x11 drivetrain simplifies shifting without sacrificing gear range, making this high-performance bike perfect for everything from solo workouts to speedy group rides.
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Frameset |
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Frame |
400 series OCLV carbon, IsoSpeed, internal routing, 3s chain keeper, DuoTrap S-compatible, mudguard mounts, flat-mount disc, 142x12 mm thru axle |
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Fork |
FX Carbon, threadless alloy steerer, hidden mudguard mounts, flat-mount disc, 405 mm axle-to-crown, 100x12 mm thru axle |
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Wheels |
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Hub front |
Formula alloy, CenterLock disc, 100x12 mm thru-axle |
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Skewer front |
Bontrager Switch thru axle, removable lever |
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Hub rear |
Shimano RXC400, CenterLock, Shimano 11-speed freehub, 142x12 mm thru axle |
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Skewer rear |
Bontrager Switch thru-axle, removable lever |
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Rim |
Bontrager Tubeless Ready Disc, 32-hole, Presta valve |
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Spokes |
14 g stainless steel |
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Tire |
Bontrager R1 Hard-Case Lite, wire bead, 60 tpi, 700x32 c |
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Max tire size |
35c without fenders, 32c with fenders |
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Drivetrain |
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Shifter |
Shimano RS700, 11-speed |
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Rear derailleur |
Shimano GRX RX812, long cage, 42T max cog |
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*Crank |
Size: XS, S |
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Shimano GRX RX600, 40T ring, 170 mm length |
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Size: M, L, XL |
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Shimano GRX RX600, 40T ring, 175 mm length |
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Bottom bracket |
Shimano BB71, 86.5mm, PressFit |
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Cassette |
Shimano SLX M7000, 11-42, 11-speed |
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Chain |
Shimano HG601 |
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Pedal |
Wellgo M141, resin body, alloy cage |
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Components |
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Saddle |
Bontrager H1 |
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Seatpost |
Bontrager alloy, 27.2 mm, 12 mm offset, 330 mm length |
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*Handlebar |
Size: XS, S |
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Bontrager Satellite Plus IsoZone, alloy, 31.8 mm, 15 mm rise, 600 mm width |
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Size: M, L, XL |
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Bontrager Satellite Plus IsoZone, alloy, 31.8 mm, 15 mm rise, 660 mm width |
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Grips |
Bontrager Satellite IsoZone Plus, lock-on, ergonomic |
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*Stem |
Size: XS |
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Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 90 mm length |
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Size: S, M |
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Bontrager Elite, 31.8 mm clamp, Blendr-compatible, 7-degree, 100 mm length |
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Size: L, XL |
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Bontrager Elite, 31.8 mm clamp, Blendr-compatible, 7-degree, 110 mm length |
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Headset |
1-1/8" threadless, sealed cartridge bearings |
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*Brake |
Size: XS, S, M, L, XL |
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Shimano hydraulic disc, MT201 lever, UR300 caliper |
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Size: XS, S, M, L, XL |
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Shimano MT201 hydraulic disc, flat-mount, 160 mm rotor |
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Brake rotor |
Shimano RT10, CenterLock, 160 mm |
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Weight |
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Weight |
M - 9.55 kg / 21.06 lbs |
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