Trek FX Sport SL 4 — Medium, Matte Deep Smoke

The Trek FX Sport SL 4 is a carbon fiber fitness bike engineered for riders who crave road bike speed with the comfort and control of a flat handlebar. A featherlight carbon frame and fork make every pedal stroke count, while the 1x drivetrain strips out complexity so you can focus on the ride.

Whether you're pushing your limits on a solo training session, keeping pace on a fast group ride, or shaving minutes off your daily commute, the FX Sport SL 4 delivers the performance to match your ambition.

Highlights

• Full carbon frame and fork — exceptionally lightweight and stiff
• 1x drivetrain — simplified shifting with a wide gear range
• Flat-bar geometry — fast and efficient without the aggressive drop-bar position
• Size: Medium | Color: Matte Deep Smoke
• Wheel size: 700c

Who It's For

Riders who want a genuine performance upgrade from an entry-level fitness bike. If speed and light weight matter to you but you're not ready to commit to drop bars, the FX Sport SL 4 is the answer.