Trek FX Sport SL 4 Fitness Bike 2027

FX Sport SL 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. The 1x drivetrain simplifies shifting without sacrificing gear range, making this high-performance bike perfect for everything from solo workouts to speedy group rides.

SPECIFICATIONS

*Please note - spec applies to all sizes unless listed separately

Frameset
Frame
400 series OCLV Carbon, internal routing, 3s chain keeper, DuoTrap S compatible, fender mounts, flat mount disc, 135x5mm ThruSkew
*Fork
Size: XS, S, M, L, XL
Carbon, hidden fender mounts, flat mount disc, 5x100mm thru-skew
Size: XS, S, M, L, XL
Carbon, hidden fender mounts, flat mount disc, 100x5mm 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 300 pounds (136 kg).

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
Size: XS, S, M, L, XL
KMC XGLIDE
Size: XS, S, M, L, XL
Shimano LG500
Pedal
Bontrager City pedals
Max chainring size
1x: 44T, 2x: 46/32

Wheels
Hub front
Formula CL-51 alloy, 100x5mm
Skewer front
135x5mm bolt-on
Hub rear
Formula CL-52 alloy, 135x5mm
Skewer rear
169x5mm bolt-on
Rim
Bontrager Paradigm, Tubeless Ready, 32-hole, 21mm width, presta valve
Spokes
14g stainless steel, black
Tire
Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700x40 c
Max tire size
700x42mm

Components
Saddle
Bontrager Commuter Comp
Seatpost
Bontrager alloy, 27.2mm, 12mm offset, 330mm length
*Handlebar
Size: XS, S
Bontrager alloy, 31.8mm, 15mm rise, 600mm width
Size: M, L, XL
Bontrager alloy, 31.8mm, 15mm rise, 660mm width
*Grips
Size: XS, S, M, L, XL
Trek Line Ergonomic Pro, lock-on
Size: XS, S, M, L, XL
Trek Ergonomic Pro, lock-on
*Stem
Size: XS
Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 90mm length
Size: S, M
Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 100mm length
Size: L, XL
Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 110mm length
Brake
Shimano hydraulic disc, MT201 lever, UR300 caliper
Brake rotor
Shimano RT10, CenterLock, 160 mm
Rotor size
Max brake rotor sizes: 160mm front & rear

We 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, colors, materials, and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.

Bike and frame weights are based off pre-production painted frames at time of publication. Weights may vary in final production.