FX Sport SL 4 is a carbon fibre fitness bike for riders who want the speed of a lightweight road bike with the comfort and control of a flat handlebar. The 1x drivetrain simplifies shifting without sacrificing gear range, making this high-performance bike perfect for everything from solo workouts to speedy group rides.

Frame
400 series OCLV Carbon, internal routing, 3s chain keeper, DuoTrap S compatible, mudguard mounts, flat mount disc, 135x5 mm ThruSkew
Fork
Carbon, hidden mudguard mounts, flat mount disc, 100x5 mm thru-skew

Weight
Weight
M - 10.90 kg / 24.04 lbs
Weight limit
This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lbs).

Drivetrain
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
KMC XGLIDE
Pedal
Bontrager City pedals
Max. chainring size
1x: 44T, 2x: 46/32

Wheels
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
Spokes
14 g stainless steel, black
Tyre
Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700x40 c
Max tyre size
700x42 mm

Components
Saddle
Bontrager Commuter Comp
Seatpost
Bontrager alloy, 27.2 mm, 12 mm offset, 330 mm length
*Handlebar
Size: S
Bontrager alloy, 31.8 mm, 15 mm rise, 600 mm width
Size: M, L, XL
Bontrager alloy, 31.8 mm, 15 mm rise, 660 mm width
Grips
Trek ergonomic PRO, lock-on
*Stem
Size: S, M
Bontrager Elite, 31.8 mm clamp, Blendr-compatible, 7-degree, 100 mm length
Size: L, XL
Bontrager Elite, 31.8 mm clamp, Blendr-compatible, 7-degree, 110 mm length
Brake
Shimano hydraulic disc, MT201 lever, UR300 calliper
Brake rotor
Shimano RT10, CenterLock, 160 mm
Rotor size
Max brake rotor sizes: 160mm front & rear