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.
*spec applies to all sizes unless otherwise noted
FRAMESET
| Frame | 400 series OCLV carbon, IsoSpeed, internal routing, 3s chain keeper, DuoTrap S compatible, fender mounts, flat mount disc, 142x12mm thru axle |
|---|---|
| Fork | FX Carbon, threadless alloy steerer, hidden fender mounts, flat mount disc, 405mm axle-to-crown, 100x12mm thru axle |
COMPONENTS
| Saddle | Bontrager H1 |
|---|---|
| Seatpost | Bontrager alloy, 27.2mm, 12mm offset, 330mm length |
| *Handlebar | Size: XS, S Bontrager Satellite Plus IsoZone, alloy, 31.8mm, 15mm rise, 600mm width |
| Size: M, L, XL Bontrager Satellite Plus IsoZone, alloy, 31.8mm, 15mm rise, 660mm width |
|
| Grips | Bontrager Satellite IsoZone Plus, lock-on, ergonomic |
| *Stem | Size: XS Bontrager Elite, 31.8 mm, Blendr compatible, 7 degree, 90mm length |
| Size: S, M Bontrager Elite, 31.8 mm, Blendr compatible, 7 degree, 100mm length |
|
| Size: L, XL Bontrager Elite, 31.8 mm, Blendr compatible, 7 degree, 110mm length |
|
| Headset | 1-1/8'' threadless, sealed cartridge bearings |
| *Brake | Size: XS, S, M, L, XL Shimano hydraulic disc, MT201 lever, UR300 caliper |
| Size: XS, S, M, L, XL Shimano MT201 hydraulic disc, flat mount, 160mm rotor |
|
| Brake rotor | Shimano RT10, centerlock, 160mm |
WEIGHT
| Weight | M - 9.55 kg / 21.06 lbs |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg). |
DRIVETRAIN
| Shifter | Shimano RS700, 11 speed |
|---|---|
| Rear derailleur | Shimano GRX RX812, long cage, 42T max cog |
| *Crank | Size: XS, S Shimano GRX RX600, 40T ring, 170mm length |
| Size: M, L, XL Shimano GRX RX600, 40T ring, 175mm length |
|
| Bottom bracket | Shimano BB71, 86.5mm, PressFit |
| Cassette | Shimano SLX M7000, 11-42, 11 speed |
| Chain | Shimano HG601 |
| Pedal | Wellgo M141, resin body, alloy cage |
WHEELS
| Hub front | Formula alloy, centerlock disc, 100x12mm thru-axle |
|---|---|
| Skewer front | Bontrager Switch thru axle, removable lever |
| Hub rear | Shimano RXC400, centerlock, Shimano 11-speed freehub, 142x12mm thru axle |
| Skewer rear | Bontrager Switch thru axle, removable lever |
| Rim | Bontrager Tubeless Ready Disc, 32-hole, presta valve |
| Spokes | 14g stainless steel |
| Tire | Bontrager R1 Hard-Case Lite, wire bead, 60 tpi, 700x32c |
| Max tire size | 35c without fenders, 32c with fenders |
**Trek Bikes reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing.
**Weights are based off pre-production products at time of publication. Weights may vary in final production.
|
Size |
Rider Height |
Inseam |
|
XS |
147 - 155 cm 4'10" - 5'1" |
69 - 73 cm 27" - 29" |
|
S |
155 - 165 cm 5'1" - 5'5" |
72 - 78 cm 28" - 31" |
|
M |
165 - 175 cm 5'5" - 5'9" |
77 - 83 cm 30" - 33" |
|
L |
175 - 186 cm 5'9" - 6'1" |
82 - 88 cm 32" - 35" |
|
XL |
186 - 197 cm 6'1" - 6'6" |
87 - 93 cm 34" - 37" |
