Trek X-Caliber 8 Mountain Bike 2021

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X-Caliber 8 Mountain Bike 2021
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Product ID: 1243834

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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 8 Mountain Bike 2021

The Trek X-Caliber 8 Mountain Bike is designed to perform at a high level in any cross-country setting but does so with high affordability. Combining a mixture of singletrack-inspired traits with dependable and lightweight components, the X-Caliber 8 is the perfect partner to take on any race, marathon or fast-paced group ride.

The Alpha Gold aluminium frame provides a solid core to the ride by being light, reactive to power input and robust for the roughest of trails. The frame is complemented by the enhanced control and line accuracy provided by the RockShox Judy SL suspension fork and its plush levels of cushioning. This fork also features a neat lockout feature for increased efficiency across smoother terrain or when climbing. The chassis is infused with composed but reactive handling thanks to its singletrack-themed geometry.

Durable but light alloy wheels afford peace of mind across harsh surfaces but also facilitate frequent changes of pace. The Smart Wheel Sizing concept ensures that the ideal size of wheels, either 27.5" or 29", are mated to the correct frame size, to award a balanced ride sensation regardless of the rider's stature. The wheel rims are compatible with tubeless-ready tyres so that this upgrade can be made easily at a later date.

Gear changes are catered for by the smooth and reliable SRAM SX Eagle setup, with its 1x12-speed configuration providing a vast range of ratios for any topography. Hydraulic disc brakes complete the build by contributing modulated and reliable stopping power in any weather conditions.


  • A high performing but affordable cross-country mountain bike perfect for races, marathons and fast group rides
  • Alpha Gold Aluminum frame is light, responsive and robust
  • RockShox Judy SL, air sprung suspension fork with lockout feature
  • Composed geometry with Smart Wheel Sizing to ensure balanced handling across sizes
  • Durable but light alloy wheels are tubeless tyre ready
  • Smooth and efficient SRAM SX Eagle 1x12 drivetrain
  • Hydraulic disc brakes are powerful and accurate

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 SL, Solo Air spring, TurnKey lockout, tapered steerer, Boost110, 15mm Maxle Stealth (sizes S, M, M/L, L, XL, XXL), 15mm Maxle Lite (size XS), travel
Headset Semi-integrated, loose ball bearing, 1-1/8" top, 1.5" bottom
Bottom Bracket Truvativ Powerspline, 73mm, threaded cartridge, 118mm spindle
Stem Bontrager Elite, 31.8mm, Blendr-compatible, 7-degree
Handlebar Bontrager alloy, 31.8mm, 5mm rise
Front Brake Shimano MT200 hydraulic disc with Shimano RT26, 6-bolt rotor
Rear Brake Shimano MT200 hydraulic disc with Shimano RT26, 6-bolt rotor
Brake Levers Shimano hydraulic
Front Derailleur NA
Rear Derailleur SRAM SX Eagle, 12-speed
Shift Levers SRAM SX Eagle, 12-speed
Cassette SRAM PG-1210 Eagle, 11-50, 12-speed
Crankset SRAM SX Eagle, GXP, 30T steel ring, Boost
Front Wheel Rim
Rear Wheel Rim
Front Tyre Bontrager XR3 Comp, wire bead, 30 tpi, 29x2.20” (Sizes
Rear Tyre Bontrager XR3 Comp, wire bead, 30 tpi, 29x2.20” (Sizes
Saddle Bontrager Arvada, steel rails, 138mm width
Seatpost Bontrager alloy, 31.6mm, 12mm offset (Sizes XS/S
Pedals VP-536 nylon platform
Claimed Manufacturers Weight 13.8kg / 30.42lbs (size M with inner tubes installed)
Weight Limit 136kg / 300lbs (combined weight of bicycle, rider and luggage)

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 specified), 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. We do not install accessories to bikes, including mudguards.

Trek X-Caliber 8 Mountain Bike 2021 Sizing

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