Why buy your bike from Sigma Sports?
Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. We’ll be happy to answer any questions you may have. Contact us now or visit us in-store.
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.
We offer FREE DELIVERY of your bike to your home or place of work. Once you've placed your order, our Customer Care team will be in contact to offer a convenient delivery date of your choice.
We've partnered with Pedalsure to offer you 30-DAYS FREE bike insurance on new bikes over £400. Visit our Cycle Insurance page to learn more and claim.
Trek X-Caliber 8 Mountain Bike 2023
Trek's X-Caliber 8 Mountain Bike is a cross country race-ready machine with an efficient, lightweight Alpha Gold Aluminium chassis featuring internal cable routing. The RockShox Judy air front fork adds 100mm (80mm for XS) of suspension for added comfort and control. The fork can be locked out for maximum efficiency when climbing steep hills and opened up again to soak up the rougher terrain.
The 12-speed Shimano groupset consists of a Deore shifter and wide-range 10-51 cassette with an XT rear derailleur to ensure smooth and accurate shifting. The hydraulic disc brakes provide powerful, reliable all-weather performance. The wheels are frame size-specific, with the smaller including 27.5" and the larger 29", ensuring effective control and responsiveness no matter your height. The rim and tyre combination offers tubeless-ready compatibility for the ultimate puncture protection and rolling efficiency.
Highlights
- Cross country race-ready machine kitted with high-performance components
- The frame is fully compatible with higher-end parts, like race wheels and a dropper post, if you ever find the need to upgrade
- Smart Wheel Sizing means you'll get the fastest wheel that fits (29˝ wheels on larger frames, 27.5˝ wheels on smaller frames)
- Tubeless-ready wheels with wider Boost141 hubs for increased wheel strength and better tyre clearance
- The Shimano Deore/XT 1x drivetrain delivers a wide range of gearing with the simplicity of a single shifter
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, 42mm offset, Boost110, 15mm Maxle Lite, travel 80mm (XS), 100mm (S, M, M/L, L, XL, XXL), maximum compatible fork travel - 120mm (XS - 100mm) |
| Headset | Semi-integrated, loose ball bearing, 1-1/8" top, 1.5" bottom |
| Bottom Bracket | Shimano SM-BB52, 73mm, threaded external bearing |
| Stem | Bontrager Elite, 31.8mm, Blendr-compatible, 7 degree, length 60mm (XS, S), 70mm (M, ML), 80mm (L), 90mm (XL, XXL) |
| Handlebar | Bontrager alloy, 31.8mm, 5mm rise, width 690mm (XS), 720mm (S, M), 750mm (ML, L, XL, XXL) |
| Grips | Bontrager XR Trail Comp, nylon lock-on |
| Front Brake | Shimano hydraulic disc, MT200 calliper, Shimano RT56, 6-bolt, rotor 180mm |
| Rear Brake | Shimano hydraulic disc, MT200 calliper, Shimano RT56, 6-bolt, rotor 160mm |
| Brake Levers | Shimano hydraulic disc, MT200 lever |
| Rear Derailleur | Shimano XT M8100, long cage, 51T maximum sprocket |
| Shift Levers | Shimano Deore M6100, 12-speed |
| Cassette | Shimano Deore M6100, 10-51, 12-speed |
| Chain | Shimano Deore M6100, 12-speed |
| Crankset | Shimano MT511, 30T steel ring, alloy spider, Boost, length 170mm (XS, S, M), 175mm (ML, L, XL, XXL) |
| Front Wheel | Bontrager Kovee, double-wall, tubeless-ready, 28-hole, 23mm width, 14g stainless steel spokes, Hub - Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru-axle |
| Rear Wheel | Bontrager Kovee, double-wall, tubeless-ready, 28-hole, 23mm width, 14g stainless steel spokes, Hub - Bontrager alloy, sealed bearing, 6-bolt, Shimano MicroSpline freehub, Boost141, 5mm QR |
| Tyres | Maxxis Ardent Race, tubeless, EXO casing, folding bead, 60TPI, 27.5"x2.35" (XS, S), 29"x2.35" (M, ML, L, XL, XXL) |
| Saddle | Bontrager Arvada, steel rails, 138mm width |
| Seatpost | Bontrager alloy, 31.6mm, 12mm offset, length 330mm (XS, S), 360mm (M), 400mm (M/L, L, XL, XXL) |
| Pedals | VP-536 nylon platform |
| Manufacturer Claimed Weight | 13.05 kg / 28.77lbs - size medium |
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. We do not install accessories to bikes, including mudguards. Bikes ordered for delivery that have tubeless compatible tyres and rims will arrive with inner tubes installed or with tubeless valves installed, this will be brand dependent. Sealant is available to be purchased separately.
If you require any assistance please contact our Customer Care team.