It's right for you if...
You're looking for a fast mountain bike for singletrack – one that's fully capable of taking on races, marathons and competitive group rides. You want something that is reliable and fun with dependable, lightweight parts.
The tech you get
A lightweight aluminium frame, a RockShox Judy SL 100 mm suspension fork with a TurnKey lockout and an air spring that's lighter and more adjustable than a coil spring, tubeless-ready wheels with Boost141 hub spacing and a Shimano Deore 1x12 drivetrain with a wide-range cassette.
The final word
With the X-Caliber 8, you're getting a performance frame paired with performance parts, like a RockShox air fork and 1x Shimano Deore drivetrain. Plus, it's equipped with durable, lightweight alloy rims that save weight and are easy to upgrade to tubeless.
favorite_borderWhy you'll love it
- It has the price of a more basic hardtail, but the parts and performance of a more expensive one
- 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)
- The 1x drivetrain delivers a wide range of gearing with the simplicity of a single shifter
High tech frame
The Alpha Gold Aluminuum frame is packed with features that make your ride better. A tapered head tube gives you more precise, confident handling on the front end, while Boost 141 rear hub spacing gives you shorter chainstays for more nimble handling at the back.
Built for speed
X-Caliber is a classic XC hardtail with quick-handling geometry, weight-conscious parts and just enough suspension to take the edge off bumps. These models are built for efficiency, making them great for racers or anyone else who wants to cover more ground in less time.
Smart Wheel Size
The right wheel size paired with your frame size gives you the perfect combination of responsiveness and control.
Locked suspension means your fork remains inactive, increasing pedalling efficiency. Perfect for extended road sections where efficiency is more important than bump absorption.
Internal cable routing
We route shift and brake cables through the frame to keep things clean and simple. And it looks great, too.
Going for a long ride? Rack mounts make carrying accessories a breeze.
Rear kickstand mount
Chainstay mounts make it easy to install a rear kickstand that stays out of your way and supports bikes of all sizes. No more laying or leaning.
Internal dropper compatible
Internal routing ports make it easy to add a dropper post upgrade that lets you lower your saddle on the fly so it's out of your way for tricky sections of trail.
*spec applies to all sizes unless otherwise noted
|Frame||Alpha Gold Aluminium, tapered head tube, internal derailleur and dropper post routing, rack and kickstand mount, Boost141, 5 mm QR|
RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, 42 mm offset, Boost110, 15 mm Maxle Lite, 80 mm travel
RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, Boost110, 15 mm Maxle Lite, 100 mm travel
M, M/L, L, XL, XXL
RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, Boost110, 15 mm Maxle Stealth, 100 mm travel
|Max compatible fork travel||120mm (XS: 100mm)|
|Hub front||Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15 mm thru axle|
|Hub rear||Bontrager alloy, sealed bearing, 6-bolt, Shimano MicroSpline freehub, Boost141, 5 mm QR|
|Rim||Bontrager Kovee, double-wall, Tubeless Ready, 28-hole, 23 mm width, Presta valve|
|Spokes||14 g stainless steel|
Maxxis Ardent Race, tubeless, EXO casing, folding bead, 60 tpi, 27.5x2.35"
M, M/L, L, XL, XXL
Maxxis Ardent Race, tubeless, EXO casing, folding bead, 60 tpi, 29x2.35"
|Tyre part||Bontrager TLR sealant, 180 ml/6 oz|
|Rim strip||Bontrager TLR|
|Max tyre size||Frame: 27.5x2.80" or 29x2.40" Fork: See manufacturer|
|Shifter||Shimano Deore M6100, 12-speed|
|Rear derailleur||Shimano XT M8100, long cage|
XS, S, M
Shimano MT511, 30T steel ring, 52 mm chainline, 170 mm length
M/L, L, XL, XXL
Shimano MT511, 30T steel ring, 52 mm chainline, 175 mm length
|Bottom bracket||Shimano SM-BB52, 73 mm, threaded external bearing|
|Cassette||Shimano Deore M6100, 10-51, 12-speed|
|Chain||Shimano Deore M6100, 12-speed|
|Pedal||VP-536 nylon platform|
|Max. chainring size||32T|
|Saddle||Bontrager Arvada, steel rails, 138 mm width|
Bontrager alloy, 31.6 mm, 12 mm offset, 330 mm length
Bontrager alloy, 31.6 mm, 12 mm offset, 360 mm length
M/L, L, XL, XXL
Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length
Bontrager alloy, 31.8 mm, 5 mm rise, 690 mm width
Bontrager alloy, 31.8 mm, 5 mm rise, 720 mm width
M/L, L, XL, XXL
Bontrager alloy, 31.8 mm, 15 mm rise, 750 mm width
|Grips||Bontrager XR Trail Comp, nylon lock-on|
Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 60 mm length
Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 70 mm length
Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 80 mm length
Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 90 mm length
|Head set||Semi-integrated, loose ball bearing, 1-1/8" top, 1.5" bottom|
|Brake||Shimano MT200 hydraulic disc|
XS, S, M, M/L, L, XL, XXL
Shimano RT26, 6-bolt,160 mm
L, XL, XXL
Shimano RT26, 6-bolt,180 mm
|Weight||M - 13.05 kg / 28.78 lbs|
|Weight limit||This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).|
Sizing & Tech
Proper bike fit is essential for best performance and comfort. Any size and geometry measurements shown on trekbikes.com are for general comparison purposes only. To find your perfect fit, visit an authorised retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.
137.0 - 155.0 cm
4'5.9" - 5'1.0"
64.0 - 73.0 cm
25.2" - 28.7"
153.0 - 166.5 cm
5'0.2" - 5'5.6"
72.0 - 79.0 cm
28.3" - 31.1"
161.0 - 172.0 cm
5'3.4" - 5'7.7"
76.0 - 81.0 cm
29.9" - 31.9"
165.5 - 179.0 cm
5'5.2" - 5'10.5"
77.0 - 84.0 cm
30.3" - 33.1"
177.0 - 188.0 cm
5'9.7" - 6'2.0"
83.0 - 88.0 cm
32.7" - 34.6"
186.0 - 196.0 cm
6'1.2" - 6'5.2"
87.0 - 92.0 cm
34.3" - 36.2"
195.0 - 203.0 cm
6'4.8" - 6'7.9"
92.0 - 95.0 cm
36.2" - 37.4"
All measurements provided in cm unless otherwise stated.
|Frame size number||Frame size letter||Wheel size||A — Seat tube||B — Seat tube angle||Effective seat tube angle||C — Head tube length||D — Head angle||E — Effective top tube||F — Bottom bracket height||G — Bottom bracket drop||H — Chainstay length||I — Offset||J — Trail||K — Wheelbase||L — Standover||M — Frame reach||N — Frame stack|