Trek FX Sport SL 6 Fitness Bike 2026

FX Sport SL 6 is an ultra-light and fast fitness bike. It has every performance feature of a high-end road bike, with the added benefit of a flat handlebar for additional comfort and control. A lightweight 400 Series OCLV Carbon frame, wireless electronic SRAM shifting, and Bontrager carbon wheels make it the best choice for serious fitness riders with serious goals.

TECHNICAL SPECIFICATIONS

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

Frameset
Specifications
*Frame    Size: S, XL, XS, L, M
400 series OCLV Carbon, internal routing, 3s chain keeper, DuoTrap S compatible, mudguard mounts, flat-mount disc, 135x5 mm ThruSkew
*Fork    Size: S, XL, XS, L, M
Carbon, hidden fender mounts, flat mount disc, 100x5mm thru-skew

Weight
Specifications
Weight    M - 9.50 kg / 20.95 lbs
Weight limit    This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg).

E-system
Specifications
*Battery    Size: S, XL, XS, L, M
SRAM AXS battery pack (with charger)

Drivetrain
Specifications
*Rear Derailleur    Size: S, XL, XS, L, M
SRAM Apex XPLR eTap AXS, 44T max cog
*Crank    Size: S, XS
SRAM Apex 1, 40T, DUB Wide, 170mm length
Size: XL, L, M
SRAM Apex 1, 40T, DUB Wide, 175mm length
*Bottom Bracket    Size: S, XL, XS, L, M
SRAM DUB, 86.5mm, PressFit
*Cassette    Size: S, XL, XS, L, M
SRAM XPLR PG-1231, 11-44, 12 speed
*Chain    Size: S, XL, XS, L, M
SRAM Apex, 12 speed
*Pedal    Size: S, XL, XS, L, M
Bontrager City pedals
Max chainring size    1x: 44T

Wheels
Specifications
*Front Wheel    Size: S, XL, XS, L, M
Bontrager Aeolus Elite 35,Tubeless Ready, 100x5 mm QR
*Rear Wheel    Size: S, XL, XS, L, M
Bontrager Aeolus Elite 35, OCLV Carbon, Tubeless Ready, Shimano 11-speed freehub, 135x5mm skewer
*Front Hub    Size: S, XL, XS, L, M
Bontrager Affinity, Tubeless Ready, centerlock, 100x5mm axle
*Front Skewer    Size: S, XL, XS, L, M
135x5mm bolt-on
*Rear Hub    Size: S, XL, XS, L, M
Bontrager Affinity Comp, Shimano 11/12 speed freehub, 142x5mm
*Rear Skewer    Size: S, XL, XS, L, M
169x5mm bolt-on
*Tire    Size: S, XL, XS, L, M
Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700x40mm
Max tire size    42mm without fenders, 40mm with fenders

Components
Specifications
*Saddle    Size: S, XL, XS, L, M
Bontrager Montrose Comp, steel rails, 138 mm width
*Seatpost    Size: S, XL, XS, L, M
Bontrager Comp, 6061 alloy, 27.2 mm, 8 mm offset, 330 mm length
*Handlebar    Size: S, XS, M
Bontrager Satellite Plus IsoZone, alloy, 31.8 mm, 15 mm rise, 600 mm width
Size: XL, L
Bontrager Satellite Plus IsoZone, alloy, 31.8 mm, 15 mm rise, 660 mm width
*Grips    Size: S, XL, XS, L, M
Bontrager Satellite IsoZone Plus, lock-on, ergonomic
*Stem    Size: XS
Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 90 mm length
Size: S, M
Bontrager Elite, 31.8 mm clamp, Blendr-compatible, 7-degree, 100 mm length
Size: XL, L
Bontrager Elite, 31.8 mm clamp, Blendr-compatible, 7-degree, 110 mm length
*Brake    Size: S, XL, XS, L, M
Shimano hydraulic disc, MT201 lever, UR300 caliper
*Brake Rotor    Size: S, XL, XS, L, M
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.