FX Sport 4 is a carbon fibre 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 drive train 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 prioritise comfort and performance equally, and want the simplicity that a 1x drive train provides.
The tech you get
A lightweight OCLV Carbon frame with a road-smoothing IsoSpeed decoupler, a Shimano GRX 1x11 drive train with a wide-range cassette, Shimano hydraulic disc brakes for all-weather stopping power, a lightweight tubeless ready wheel set and ergonomic grips. Plus, it's easy to accessorise with mudguards, lights and more!
The final word
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 drive train provides.
Why you'll love it
The 1x drive train 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 for 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 favourite fitness app when you add DuoTrap S
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, colors, and materials.
Specifications
*spec applies to all sizes unless otherwise noted
Frameset
Frame: 400 series OCLV carbon, IsoSpeed, internal routing, 3s chain keeper, DuoTrap S-compatible, mudguard mounts, flat-mount disc, 142x12 mm thru axle
Fork: FX Carbon, threadless alloy steerer, hidden mudguard mounts, flat-mount disc, 405 mm axle-to-crown, 100x12 mm thru axle
Wheels
Front hub: Formula alloy, CenterLock disc, 100x12 mm thru-axle
Rear hub: Shimano RXC400, CenterLock, Shimano 11-speed freehub, 142x12 mm thru axle
Rim: Bontrager Tubeless Ready Disc, 32-hole, Presta valve
Spokes: 14 g stainless steel, black
Tyre: Bontrager R1 Hard-Case Lite, wire bead, 60 tpi, 700x32 c
Drivetrain
Shifter: Shimano RS700, 11-speed
Rear derailleur: Shimano GRX RX812, long cage, 42T max cog
*Crank: Size: XS, S
Shimano GRX RX600, 40T ring, 170 mm length
Size: M, L, XL
Shimano GRX RX600, 40T ring, 175 mm length
Bottom bracket: Shimano BB71, 86.5 mm, PressFit
Cassette: Shimano SLX M7000, 11-42, 11-speed
Chain: Shimano HG601
Pedal: Wellgo M141, resin body, alloy cage
Components
Saddle: Bontrager H1
Seatpost: Bontrager alloy, 27.2 mm, 12 mm offset, 330 mm length
*Handlebar: Size: XS, S
Bontrager Satellite Plus IsoZone, alloy, 31.8 mm, 15 mm rise, 600 mm width
Size: M, L, XL
Bontrager Satellite Plus IsoZone, alloy, 31.8 mm, 15 mm rise, 660 mm width
Grips: Bontrager Satellite IsoZone Plus, lock-on, ergonomic
*Stem: Size: XS
Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 90 mm length
Size: S, M
Bontrager Elite, 31.8 mm clamp, Blendr-compatible, 7-degree, 100 mm length
Size: L, XL
Bontrager Elite, 31.8 mm clamp, Blendr-compatible, 7-degree, 110 mm length
Head set: 1-1/8" threadless, sealed cartridge bearings
Brake: Shimano MT201 hydraulic disc, flat-mount, 160 mm rotor
Brake rotor: Shimano RT10, 160 mm, CenterLock
Weight
Weight: M - 9.55 kg / 21.06 lbs
Weight limit: This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).
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