2021 Trek FX Sport Carbon 4

High-end component level carbon frame fitness bike

View on www.trekbikes.com

2021 Trek FX Sport Carbon 4
  • MSRP $1,699
  • Weight 21.1 lbs / 9.6 kg
  • Suspension Rigid
  • Frame Carbon
  • Fork Carbon
  • Wheels 700c
  • Drivetrain 1 × 11
  • Groupset GRX 800, 105
  • Brakes Hydraulic Disc

Where to Buy


1 × 11 — 11 speed

2021 Trek FX Sport Carbon 4
29 mph
Similar Bikes
35 mph

The 2021 FX Sport Carbon 4 is easier to ride up hills than similar bikes.

The 2021 FX Sport Carbon 4 won‘t keep up with similar bikes while riding downhill or sprinting.

Estimated Spec Level

Estimated spec level of the FX Sport Carbon 4 compared to other fitness bikes. 99 Spokes analyzes the build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more to estimate the overall spec level of each bike.

Learn more

est. spec level →$0$500$1,000$1,500$2,000
This bike
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Frame400 series OCLV carbon, IsoSpeed, internal routing, 3s chain keeper, DuoTrap S compatible, fender mounts, flat mount disc, 142x12mm thru axle
ForkFX Carbon, threadless alloy steerer, hidden fender mounts, flat mount disc, 405mm axle-to-crown, 100x12mm thru axle
Bottom BracketShimano BB71, 86.5mm, PressFit
Headset1-1/8'' threadless, sealed cartridge bearings
StemBontrager Elite, 31.8mm clamp, Blendr compatible, 7 degree, 110mm length
HandlebarBontrager Satellite Plus IsoZone, alloy, 31.8mm, 15mm rise, 660mm width
SaddleBontrager H1
SeatpostBontrager alloy, 27.2mm, 12mm offset, 330mm length
GripsBontrager Satellite IsoZone Plus, lock-on, ergonomic
Rear DerailleurShimano GRX RX812, long cage, 42T max cog
CrankShimano GRX RX600, 40T ring, 175mm length
ShiftersShimano RS700, 11 speed
CassetteShimano SLX M7000, 11-42, 11 speed
ChainShimano HG601
BrakesShimano MT201 hydraulic disc, flat mount, 160mm rotor
RimsBontrager Tubeless Ready Disc, 32-hole, presta valve
Front HubFormula alloy, centerlock disc, 100x12mm thru-axle
Rear HubShimano RXC400, centerlock, Shimano 11-speed freehub, 142x12mm thru axle
TiresBontrager R1 Hard-Case Lite, wire bead, 60 tpi, 700x32c
Disk RotorsShimano RT10, 160mm, centerlock
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2021 Trek FX Sport Carbon 4