Trek FX Sport Carbon 6 Gen 4
The FX Sport 6 is the lightest and fastest fitness bike in the line-up. It has every performance feature of a high-end road bike, with the added benefit of flat handlebars for additional comfort and control. A lightweight 400 Series OCLV Carbon frame, a high-quality Shimano drivetrain and Bontrager carbon wheels make it the best choice for serious fitness riders with serious goals.
It's right for you if...
You want the fastest fitness bike you can get – one that can hold its own with any road bike out there. You want to keep up with faster group rides, put on more miles, set new Strava PRs and leave a pack of roadies in your dust as you sprint to the town line.
The tech you get
A lightweight 400 Series OCLV Carbon frame with a carbon fork, a 1x Shimano GRX/SLX drivetrain with a wide range of gearing, hydraulic disc brakes, hidden mudguard mounts, a lightweight Bontrager Aeolus Elite 35 carbon wheel set with high-quality tubeless-ready Bontrager GR1 Team Issue gravel tyres and a vibration-absorbing handlebar with ergonomic grips.
The final word
The fastest fitness bike. Period. A lightweight OCLV Carbon frame and fork, a high-performance 1x drivetrain, and a light and responsive carbon wheel set make FX Sport 6 the ideal ride for anyone who wants to ride ridiculously fast and crush fitness milestones.
| Frame | 400 series OCLV Carbon, internal routing, 3s chain keeper, DuoTrap S compatible, mudguard mounts, flat mount disc, 135x5 mm ThruSkew |
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| Fork | Carbon, hidden mudguard mounts, flat mount disc, 5x100 mm thru-skew |
| Wheel front | Bontrager Aeolus Elite 35, OCLV Carbon, Tubeless Ready, 100x5 mm QR |
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| Wheel rear | Bontrager Aeolus Elite 35, OCLV Carbon, Tubeless Ready, Shimano 11-speed freehub, 135x5 mm skewer |
| Skewer front | 135x5 mm bolt-on |
| Skewer rear | 169x5 mm bolt-on |
| Tyre | Bontrager GR1 Team Issue, Tubeless Ready, Inner Strength casing, aramid bead, 120 tpi, 700 x 40 c |
| Max tyre size | 700x42mm without mudguards, 700x40mm with mudguards |
| Shifter | Shimano RS700, 11-speed |
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| Rear derailleur | Shimano GRX RX812, long cage, 42T max cog |
| *Crank |
Size: XS, S Shimano GRX RX600, 40T ring, 170 mm length |
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Size: M, L, XL Shimano GRX RX600, 40T ring, 175 mm length |
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| Bottom bracket | Shimano RS500, 86 mm, PressFit |
| Cassette | Shimano SLX M7000, 11-42, 11 speed |
| Chain | Shimano 105 HG601, 11-speed |
| Pedal | VPE-993T |
| Max. chainring size | 1x: 44T |
| Saddle | Bontrager Montrose Comp, steel rails, 138 mm width |
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| Seatpost | Bontrager Comp, 6061 alloy, 27.2 mm, 8 mm offset, 330 mm length |
| *Handlebar |
Size: XS, S, M Bontrager Satellite Plus IsoZone, alloy, 31.8 mm, 15 mm rise, 600 mm width |
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Size: L, XL Bontrager Satellite Plus IsoZone, alloy, 31.8 mm, 15 mm rise, 660 mm width |
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| Grips | Bontrager Satellite IsoZone Plus, lock-on, ergonomic |
| *Stem |
Size: XS Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 90 mm length |
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Size: S, M Bontrager Elite, 31.8 mm clamp, Blendr-compatible, 7-degree, 100 mm length |
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Size: L, XL Bontrager Elite, 31.8 mm clamp, Blendr-compatible, 7-degree, 110 mm length |
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| Brake | Shimano hydraulic disc, MT201 lever, UR300 calliper |
| Brake rotor | Shimano RT10, CenterLock, 160 mm |
| Rotor size | Max brake rotor sizes: 160mm front & rear |
| Weight | M - 9.47 kg / 20.88 lbs |
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| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb). |
