Caution X-Caliber will get you hooked. It packs all of Trek’s XC race hardtail experience into a light, fast, race-ready bike that pairs the right wheel size with each frame size.
Nothing beats the efficiency, simplicity and straight-up fun of an X-Cal hardtail in 29er or 27.5". Great for XC racing, marathons, 24-hour racing, or simply shredding singletrack.
Smart Wheel Size
One wheel size does not fit all. We put the right size wheel on every frame 27.5” on 13.5” and 15.5” frames, 29er on 17.5” and up. Everyone wins.
2x drivetrain options, suspension lockout, and Shimano hydraulic disc brakes mean you’re ready to roll right from the go.
Light, precise race frame
Highly refined Alpha Aluminium frame uses sophisticated tube shaping to minimise weight and maximise race-day performance.
More sizes fit more riders
Extended size range includes the small 13.5", the additional mid-range 18.5", and the extra-large 23" to better fit more riders.
Frame: Alpha Gold Aluminium w/semi-integrated head tube, mechanically formed and butted tubing, race geometry, internal front derailleur routing, rack and mudguard mounts, G2 Geometry on 29ers
Front suspension: RockShox 30 Silver, coil spring, preload, rebound, TurnKey lockout, G2 Geometry w/51mm offset on 29ers, 100mm travel (13.5 : 80mm travel)
Wheels: Formula DC20 alloy front hub; Formula DC22 alloy rear hub; Bontrager Connection 32-hole double-walled rims
Front Hub: Formula DC20 alloy
Rear Hub: Formula DC22 alloy
Rims: Bontrager Connection 32-hole double-walled rims
Spokes: Bontrager 14g
Tyres: Bontrager XR2, 29x2.20" front, 29x2.00" rear (13.5 & 15.5: 27.5x2.20")
Shifters: Shimano Acera M3000, 9-speed
Front derailleur: Shimano Acera
Rear derailleur: Shimano Acera M3000, Shadow
Crank: Shimano M3000, 40/30/22
Bottom bracket: Sealed cartridge
Cassette: Shimano HG20, 11-34, 9-speed
Chain: KMC X9
Pedals: Wellgo nylon platform
Saddle: Bontrager Evoke 1.5
Seat post: Bontrager SSR, 2-bolt head, 27.2mm, 12mm offset
Handlebar: Bontrager alloy, 31.8mm, 15mm rise
Stem: Bontrager Elite, 31.8mm, 7 degree, Blendr compatible
Grips: Bontrager Race
Headset: 1-1/8" threadless, semi-integrated, semi-cartridge bearings
Brakes: Shimano M315 hydraulic disc