2026 Trek FX Sport 4 Carbon : Matte Onyx Carbon : M
2026 Trek FX Sport 4 Carbon : Matte Onyx Carbon : M
2026 Trek FX Sport 4 Carbon : Matte Onyx Carbon : M
2026 Trek FX Sport 4 Carbon : Matte Onyx Carbon : M

Trek FX Sport SL 4 2026 | Matte Onyx Carbon

£1,500.00

Trek FX Sport SL 4 | Carbon Flat Bar Fitness BikeThe Trek FX Sport SL 4 is a lightweight carbon fibre fitness bike built for riders who want road bike speed with the control and comfort of a flat handlebar. Whether you're clocking up solo training miles or keeping pace — Read More

Out of Stock
 £1,500.00
This item is in stock at the following locations:
Lake District WarehouseIn stock
 £1,500.00

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  • M
  • L

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  • Onyx Carbon

£

GTIN (UPC): TREKFXSPORTSL425ONYXCARBON Categories: ,

Spread the cost from £112.50 monthly*
Buying Guides

Description

Trek FX Sport SL 4 | Carbon Flat Bar Fitness Bike

The Trek FX Sport SL 4 is a lightweight carbon fibre fitness bike built for riders who want road bike speed with the control and comfort of a flat handlebar. Whether you’re clocking up solo training miles or keeping pace on group rides, this performance-focused hybrid offers a fast, smooth, and confident ride — without the complexity of drop bars.

At the heart of the FX Sport SL 4 is Trek’s 400 Series OCLV Carbon frame and fork, delivering impressive stiffness and vibration damping for long-distance comfort. The bike runs a simplified Shimano CUES 1×10-speed drivetrain, giving you a wide gear range without the hassle of front shifting. It’s kitted out with Shimano hydraulic disc brakes for confident stopping in all weather, and rolls on lightweight, tubeless-ready wheels wrapped in fast-rolling Bontrager GR1 Expert tyres — perfect for tarmac and light gravel. Ergonomic grips and a comfort-focused bar further elevate the riding experience.

Highlights

  • Lightweight 400 Series OCLV Carbon frame and fork

  • Shimano CUES 1×10 drivetrain with wide-range cassette

  • Shimano hydraulic disc brakes for all-weather control

  • Tubeless-ready wheels with Bontrager GR1 Expert tyres

  • Vibration-absorbing handlebar and ergonomic grips

Ideal for fitness-focused riders who prefer a flat bar setup, the FX Sport SL 4 strikes a perfect balance of speed, simplicity and comfort for long miles on the road or light trails.

Bike specifications are advised by the manufacturer and can be subject to change without prior warning.

Please call our helpful sales team on 01539 821 443 or email us for the latest up-to-date product information.

Specification

Brand

Trek
Frame

400 series OCLV Carbon, internal routing, 3s chain keeper, DuoTrap S compatible, mudguard mounts, flat mount disc, 135×5 mm ThruSkew
Fork

Carbon, hidden mudguard mounts, flat mount disc, 100×5 mm thru-skew
Handle Bars

Bontrager Satellite Plus IsoZone, alloy, 31.8 mm, 15 mm rise
Tape Grips

Bontrager Satellite IsoZone Plus, lock-on, ergonomic
Brakes

Shimano hydraulic disc, MT201 lever, UR300 calliper
Rear Derailleur

Shimano CUES U6000 GS
Rear Hub

Formula CL-52 alloy, 135×5 mm QR
Front Hub

Formula CL-51 alloy, 100×5 mm QR
Shift Levers

Shimano CUES U6000 w/optical gear display, 10-speed
Cassette

Shimano CUES LG300, LINKGLIDE, 11-48, 10-speed
Chainset

Prowheel alloy, 42T narrow-wide ring, 175 mm length
Front Tyre

Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700×40 mm
Rear Tyre

Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700×40 mm
Saddle

Bontrager H1
Seat Post

Bontrager alloy, 27.2 mm, 12 mm offset, 330 mm length
Discipline

Leisure
Material

Carbon
Electric

No
Season

2025

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Checkout with V12 Finance with online acceptance

Checkout with V12 Finance with online acceptance

We contact you to confirm order and arrange shipping

We contact you to confirm order and arrange shipping

Please use our calculator below to help you see what finance options are available. To apply for finance, please select this option at the checkout.
Step 1:Choose your finance option

Please specify the finance option that you wish to choose.

From £112.50 per month.

Step 2:Choose your deposit amount

Please specify the deposit amount that you wish to pay.

The accepted value is between £150.00 and £450.00

Representative finance example

Amount of credit £1350.00. 12 monthly repayments of £112.50. Representative APR 0.00%. Total amount repayable £1350.00.
APR Fixed 0.00%
Installment Amount £112.50/month
Repayment Term 12 months
Total Interest Charged £0.00
Deposit Amount £150.00

Cycle to work scheme

Wheelbase has teamed up with CycleScheme, Bike2Work Scheme, Green Commute Initiative, as well as, Vivup, Gogeta, Cycle Solutions & Halfords to offer PAYE employees a healthier way to commute. The scheme stems from the U.K Government's Green Transport Plan which is designed to get more people out and about riding bikes and reaping the multitude of personal and environmental benefits!

To make a purchase using a Cycle To Work Voucher, please submit an enquiry using this form. We are happy to reserve the bike for up to two weeks with a holding deposit whilst you await your voucher. If you would like us to go ahead and set up your order, please submit a shipping address and phone number. These details are required to process the order. We will make contact to confirm your order and advise the next steps.

If you would like more information, feel free to submit the enquiry without a shipping address.

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