The Trek FX Sport SL 4 2027 brings a lightweight 400 Series OCLV Carbon frame to the FX Sport range — road-bike speed with the comfort and control of a flat handlebar.
WHO THIS BIKE SUITS
You want a genuine carbon fitness bike, not an aluminium one.
You want the speed of a road bike without drop bars.
You're happy with a dependable Shimano CUES 10-speed drivetrain.
IF YOU'RE LOOKING FOR SOMETHING DIFFERENT
If aluminium suits your budget better, the AL 3 gets you a similar drivetrain for considerably less. If you want SRAM's wide-range 1x drivetrain, the SL 5 steps up.
WHERE IT SITS IN THE RANGE
The SL 4 is the entry point into the carbon FX Sport range — the same 400 Series OCLV Carbon frame as the SL 5 and SL 6, with a Shimano CUES drivetrain keeping the price more accessible.
Full FX Sport range: AL 3 — AL Equipped — AL Equipped Midstep — SL 5 — SL 6.
HOW IT RIDES
The carbon frame keeps things fast and responsive, accelerating quicker and handling with more confidence than the aluminium AL tier. A slightly shorter reach and taller stack put you in a more upright, balanced position for smooth power delivery and all-day rideability — reviewers consistently praise the line as genuinely quick, closer to a road bike than a typical hybrid.
THE FINAL WORD
The Trek FX Sport SL 4 2027 gets you onto the lighter carbon platform at the most accessible price. Come in and we'll help you decide whether this or a higher SL tier suits you.
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, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice. Bike and frame weights are based on pre-production painted frames at time of publication. Weights may vary in final production.
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
Headset: Integrated, tapered, internal cable routing through headset
Bottom bracket: Sealed cartridge, 68 mm
Shifters: Shimano CUES U6000
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: Shimano LG500, 9/10/11-speed
Brakeset: Shimano hydraulic disc, MT201 lever
Rotor: Shimano RT10, CenterLock, 160 mm
Rims: Bontrager Paradigm, Tubeless-Ready, 32-hole, 21 mm width, Presta valve
Front hub: Formula CL-51 alloy, 100x5 mm
Rear hub: Formula CL-52 alloy, 135x5 mm
Tyres: Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700x40 mm
Handlebar: Bontrager alloy, 31.8 mm, 15 mm rise, 660 mm width
Stem: Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 110 mm length
Saddle: Bontrager Commuter Comp
Seatpost: Bontrager alloy, 27.2 mm, 12 mm offset, 330 mm length
Personalised Bike Consultation
Not sure which model is perfect for you? Our expert team at All Ride Now in Midhurst, West Sussex is here to help you choose with confidence.
- Will you be riding mainly on or off-road?
- Do you prefer an upright or sportier riding position?
- Are you looking for longer range, lighter weight, or a more comfortable feel?
Through a friendly consultation – in-store, by phone, live chat or email – we’ll help you narrow down your options and find the bike that best fits your needs.
