Trek FX Sport SL 4 2027 - Hybrid Sports Bike

The Trek FX Sport SL 4 is a lightweight carbon fitness bike built for speed and versatility. Its comfortable geometry, wide tyres and reliable 1x drivetrain make it ideal for road riding, cycle paths and light gravel routes.
Key Features:
- 400 Series OCLV Carbon frame with upright fitness geometry and mounts
- Full carbon fork with hidden mudguard mounts and flat-mount disc fittings
- Shimano CUES LINKGLIDE 1x10-speed drivetrain with 11-48T cassette
- 700c wheels with Bontrager GR1 Expert 700x40c tyres
- Rack, mudguard and top tube bag mounts for everyday versatility
- Available with 0% APR finance
The Trek FX Sport SL 4 is designed for riders who want the efficiency of a lightweight road bike with the comfort and versatility to explore beyond smooth tarmac. Whether you're heading out for fitness rides, joining a fast-paced group ride or commuting during the week, it offers a responsive ride with the confidence to tackle mixed surfaces.
At the heart of the bike is Trek's lightweight 400 Series OCLV Carbon frame. It delivers a lively, responsive ride while helping reduce fatigue over longer distances. The updated fit features a slightly shorter reach and taller stack, placing you in a more upright, balanced riding position that's comfortable for long days in the saddle without feeling sluggish when it's time to pick up the pace.
A full carbon fork complements the frame by reducing weight and helping absorb vibration from rough roads and gravel tracks. Hidden mudguard mounts preserve the bike's clean appearance while making it easy to fit full-length guards for year-round riding.
The Shimano CUES 1x10-speed drivetrain keeps shifting simple and dependable. A 42T narrow-wide chainring works with an 11-48T LINKGLIDE cassette to provide a wide gear range for everything from steep climbs to fast road sections. The 1x setup also reduces maintenance and removes the complexity of a front derailleur, allowing you to focus on the ride.
The supplied specification does not list the brake model, but the bike is equipped with hydraulic disc brakes that provide dependable stopping power and control in both dry and wet conditions.
Rolling on 700c wheels with Bontrager GR1 Expert 700x40mm tyres, the FX Sport SL 4 combines efficient rolling on tarmac with added grip and comfort when the route turns onto gravel paths or rougher tracks. The generous tyre clearance allows riders to confidently explore a wider variety of terrain.
Practicality is built into the frame with mounts for a rear rack, mudguards, multiple bottle cages and a top tube bag. These make it easy to carry commuting essentials, ride further with extra supplies or prepare the bike for longer adventures.
The Blendr-compatible Bontrager stem also allows compatible lights and cycling computers to be mounted neatly, helping create a clean cockpit while keeping accessories within easy reach.
Overall, the Trek FX Sport SL 4 blends the speed and responsiveness of a lightweight carbon bike with the comfort, simplicity and versatility needed for everyday riding, fitness goals and mixed-surface adventures.
Occasionally, without notice, manufacturers change product design and/or specifications.
| Fork | Carbon, hidden mudguard mounts, flat mount disc, 100x5 mm thru-skew |
| Stem | Bontrager Elite, 31.8 mm, Blendr-compatible |
| Bars | Bontrager alloy, 31.8 mm, 15 mm rise, 660 mm width |
| Rear Mech | Shimano CUES U6000 GS |
| Speed | 10 |
| Front Hub | Formula CL-51 alloy, 100x5 mm |
| Rear Hub | Formula CL-52 alloy, 135x5 mm |
| Front Tyre | Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700x40 mm |
| Rear Tyre | Bontrager GR1 Expert, Hard-Case Lite, wire bead, 60 tpi, 700x40 mm |
| Seat Post | Bontrager alloy, 27.2 mm, 12 mm offset, 330 mm length |
| Saddle | Bontrager Commuter Comp |
| Chainset | Prowheel alloy, 42T narrow-wide ring, 175 mm length |
| Chain | Shimano LG500, 9/10/11-speed |
| Cassette | Shimano CUES LG300, LINKGLIDE, 11-48, 10-speed |
| Pedals | Bontrager City pedals |
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Trek FX+ Size Chart
|
Size |
Height cm |
Height Feet / Inches |
Inseam cm |
Inseam Inches |
|
XS |
147 – 155 cm |
4’10” – 5’1” |
69 – 73 cm |
27” – 29” |
|
S |
155 - 165 cm |
5'1" - 5'5" |
72 - 78 cm |
28" - 31" |
|
M |
165 - 175 cm |
5'5" - 5'9" |
77 - 83 cm |
30" - 33" |
|
L |
175 - 186 cm |
5'9" - 6'1" |
82 - 88 cm |
32" - 35" |
|
XL |
186 - 197 cm |
6'1" - 6'6" |
87 - 93 cm |
34" - 37" |
|
XL |
197 – 203 cm |
6’6” – 6’8” |
92 – 95 cm |
36” – 37” |
What size frame do I need if I am between sizes? - read here
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