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Trek X-Caliber 9 Mountain Bike 2021

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X-Caliber 9 Mountain Bike 2021

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Product ID: 1171168

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Built, Checked, Tuned and Tested

All our bikes are fully built by our Cytech qualified mechanics. To find out more, see the Built, Checked, Tuned and Tested section below to see how we'll deliver your bike.

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Trek X-Caliber 9 Mountain Bike 2021

An incredibly good value cross-country mountain bike, the Trek X-Caliber 9 is ready to start racing or tackling local loops straight away. The Alpha Platinum Aluminium frame is light and efficient, with internal cable routing, and the RockShox Judy Silver fork adds 100mm of front suspension for comfort and control (size XS - 80mm) with a remote lockout lever for maximum efficiency on smoother trails. The frame is also compatible with internally routed dropper seatposts if preferred.

The curated groupset consists of an SLX shifter and wide-range 10-51 cassette with Shimano’s excellent XT rear derailleur to ensure that all shifts are crisp and accurate. The hydraulic disc brakes are also from Shimano in the form of MT400 units for reliable all-weather performance. Frame-size-specific wheels, with the smaller sizes getting 27.5” and the larger sizes 29” ensure the handling and ride feel is consistent across the whole range.


  • Alpha Gold Aluminium frame with internal derailleur and dropper post routing and Boost14
  • RockShox Judy Silver, Solo Air spring with TurnKey remote lockout, 100mm travel (XS - 80mm)
  • Shimano SLX/XT 12-speed drivetrain
  • Shimano MT400 hydraulic disc brakes
  • Bontrager Kovee Tubeless Ready wheels, 29” (Size XS and S: 27.5”)

Technical Specification

Frame Trek Alpha Gold Aluminium, tapered head tube, internal derailleur and dropper post routing, rack and kickstand mount, Boost141, 5mm QR
Fork RockShox Judy Silver, Solo Air spring, TurnKey remote lockout, tapered steerer, 42mm offset, Boost110, 15mm Maxle Lite, 100mm travel (XS
Headset Semi-integrated, sealed cartridge bearing, alloy cups, 1-1/8" top, 1.5" bottom
Stem Bontrager Elite, 31.8 mm, Blendr-compatible, 7 degree
Handlebar Bontrager alloy, 31.8mm, 5mm rise
Grips Bontrager XR Trail Comp, lock-on
Brakes Shimano hydraulic disc MT400 caliper
Brake Levers Shimano hydraulic disc, MT401
Rear Derailleur Shimano XT M8100, long cage, 51T max cog, 12-speed
Shift Levers Shimano SLX M7100, 12-speed
Cassette Shimano SLX M7100, 10-51, 12-speed
Chain Shimano SLX M7100, 12-speed
Crankset Shimano MT610, 30T steel ring, Boost
Front Wheel Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru-axle hub with Bontrager Kovee, double-wall, Tubeless Ready, 32-hole, 23mm width, Presta valve rim
Rear Wheel Bontrager alloy, sealed bearing, 6-bolt, Shimano MicroSpline freehub, Boost141, 5mm QR hub with Bontrager Kovee, double-wall, Tubeless Ready, 32-hole, 23mm width, Presta valve rim
Tyres Bontrager XR3 Comp, wire bead, 30 TPI, 29x2.20" (Size XS and S
Saddle Bontrager Arvada, steel rails
Seatpost Bontrager alloy, 31.6mm, 12mm offset
Pedals VP-536 nylon platform
Weight Limit 136kg (bike, rider and cargo)
Manufacturer Claimed Weight M - 13.32 kg / 29.37 lbs (with tubes)

Built, Checked, Tuned and Tested

All our bikes are fully built, checked, tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for delivery. All you have to do is add the pedals (if included), attach the handlebars to the stem and tighten them following the included detailed instructions or by watching our video and using the provided FREE tools. Visit our Bike Assembly page to see how you assemble your new bike once you receive it.

All bikes collected from our shop, are built, tested and ready to ride.

Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. Bikes ordered for delivery will not arrive with the pedals installed, please refer to the owners manual and pedal installation guides provided for guidance or contact Customer Care. We do not install accessories to bikes, including mudguards.

Trek X-Caliber 9 Mountain Bike 2021 Sizing

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