FX Sport 4 is a carbon fiber fitness bike for riders who want the speed of a lightweight road bike with the comfort and control of a flat handlebar. An IsoSpeed decoupler smooths out rough roads and the 1x11 drivetrain simplifies shifting without sacrificing gear range, making this high-performance bike perfect for everything from solo workouts to speedy group rides.
It's right for you if you're ready to log big miles, and you prefer the feel of a flat handlebar to the drop bars that come stock on most road bikes. You prioritize comfort and performance equally, and want the simplicity a 1x drivetrain provides.
The FX Sport Carbon 4 uses a lightweight OCLV Carbon frame with a road-smoothing IsoSpeed decoupler, a Shimano GRX 1x11 drivetrain with a wide-range cassette, Shimano hydraulic disc brakes for all-weather stopping power, a lightweight tubeless ready wheelset, and ergonomic grips. Plus, its easy to accessorize with fenders, lights, and more!
Fast, capable, comfortable. This bike has a road-smoothing carbon frame and quality parts that will hold up over serious miles, but what really sets this model apart is the simpler shifting experience the 1x11 drivetrain provides.
- The 1x drivetrain delivers a wide range of gearing with the simplicity of a single shifter
- You get the superior ride quality of carbon without the bank-breaking price
- IsoSpeed—a decoupler at the seat tube/top tube junction that absorbs fatiguing bumps from the road so you can stay stronger longer
- On your left, roadie! This fitness bike is more than capable of taking on speedy group road rides
- You can pair FX Sport with your smartphone and send your ride data to your favorite fitness app when you add DuoTrap S
400 series OCLV carbon, IsoSpeed, internal routing, 3s chain keeper, DuoTrap S compatible, fender mounts, flat mount disc, 142x12mm thru axle
FX Carbon, threadless alloy steerer, hidden fender mounts, flat mount disc, 405mm axle-to-crown, 100x12mm thru axle
Front: 100 x 12mm thru axle
Rear: 142 x 12mm thru axle
Bontrager Tubeless Ready Disc, 32-hole, presta valve
Front: Formula alloy, Center Lock disc
Rear: Shimano RXC400, Center Lock, Shimano 11-speed freehub
14g, stainless steel, black
Bontrager R1 Hard-Case Lite, wire bead, 60 tpi, 700x32c
Shimano GRX RX600
Shimano BB71, 86.5mm, PressFit
Shimano GRX RX812, long cage, 42T max cog
Shimano SLX M7000, 11-42T, 11 speed
Shimano RS700, 11 speed
Bontrager Satellite Plus IsoZone
Bontrager Satellite IsoZone Plus, lock-on, ergonomic
Bontrager Elite, 31.8mm, Blendr compatible
Shimano MT201 hydraulic disc
Shimano MT201 hydraulic disc, flat mount, 160mm rotors
Wellgo M141, resin body, alloy cage
Bontrager alloy, 27.2mm, 12mm offset, 330mm length