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 Alpha Gold Aluminum frame, a RockShox 30 Silver 100mm suspension fork with a lockout and an air spring that's lighter and more adjustable than a coil spring, Bontrager Kovee Tubeless Ready wheels with Boost141 hub spacing, Shimano hydraulic disc brakes, and a smooth, efficient SRAM SX Eagle 1x12 drivetrain with a wide-range cassette.
The final word
With X-Caliber 8, you're getting a performance frame paired with performance parts, like a RockShox air fork and 1x SRAM Eagle 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 and the performance of a more expensive one
- The RockShox air fork has a rebound adjust and can be tuned to the rider’s weight, and it’s way higher quality than what you’d normally get on an MTB at this price
- 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)
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 pedaling efficiency. Perfect for extended road sections where efficiency is more important than bump absorption.
Going for a long ride? Rack mounts make carrying accessories a breeze.
*spec applies to all sizes unless otherwise noted
|Frame||Alpha Gold Aluminum, tapered head tube, internal derailleur & dropper post routing, rack & kickstand mount, Boost141, 5mm QR|
RockShox 30 Silver, Solo Air spring, rebound adjust, TurnKey hydraulic lockout, tapered steerer, 42mm offset for 27.5'' wheel, 100mm QR, 80mm travel
RockShox 30 Silver, Solo Air spring, rebound adjust, TurnKey hydraulic lockout, tapered steerer, 42mm offset for 27.5'' wheel, 100mm QR, 100mm travel
M, M/L, L, XL, XXL
RockShox 30 Silver, Solo Air spring, rebound adjust, TurnKey hydraulic lockout, tapered steerer, 46mm offset for 29'' wheel, 100mm QR, 100mm travel
|Front Hub||Formula DC-20 LW, alloy, 6-bolt, 5x100mm QR|
|Rear Hub||Formula DC-2241, alloy, 6-bolt, Shimano 8/9/10 freehub, Boost141, 5mm QR|
|Rim||Bontrager Kovee, double-wall, Tubeless Ready, 32-hole, 23mm width, presta valve|
Bontrager XR3 Comp, wire bead, 30 tpi, 27.5x2.20''
M, M/L, L, XL, XXL
Bontrager XR3 Comp, wire bead, 30 tpi, 29x2.20''
|Shifter||SRAM SX Eagle, 12 speed|
|Rear Derailleur||SRAM SX Eagle|
SRAM SX Eagle, GXP, 30T steel ring, Boost, 170mm length
M, M/L, L, XL, XXL
SRAM SX Eagle, GXP, 30T steel ring, Boost, 175mm length
|Bottom Bracket||Truvativ Powerspline, 73mm, threaded cartridge, 118mm spindle|
|Cassette||SRAM PG-1210 Eagle, 11-50, 12 speed|
|Chain||SRAM SX Eagle, 12 speed|
|Pedal||VP-536 nylon platform|
|Saddle||Bontrager Arvada, steel rails, 138mm width|
Bontrager alloy, 31.6mm, 12mm offset, 330mm length
Bontrager alloy, 31.6mm, 12mm offset, 360mm length
M/L, L, XL, XXL
Bontrager alloy, 31.6mm, 12mm offset, 400mm length
Bontrager alloy, 31.8mm, 5mm rise, 690mm width
S, M, M/L, L, XL, XXL
Bontrager alloy, 31.8mm, 5mm rise, 720mm width
|Grips||Bontrager XR Trail Comp, nylon lock-on|
Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 60mm length
Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 70mm length
Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 80mm length
Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 90mm length
|Headset||Semi-integrated, cartridge bearing, 1-1/8'' top, 1.5'' bottom|
|Brake||Shimano MT200 hydraulic disc|
- M - 13.44 kg / 29.63 lbs (with tubes)
- Weight limit
- This bike has a maximum total weight limit (combined weight of bicycle, rider and cargo) of 136 kg (300 lb).
Sizing & fit
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 authorized Trek 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 - 162.0 cm
5'0.2" - 5'3.8"
72.0 - 76.0 cm
28.3" - 29.9"
161.0 - 172.0 cm
5'3.4" - 5'7.7"
76.0 - 81.0 cm
29.9" - 31.9"
170.0 - 179.0 cm
5'6.9" - 5'10.5"
80.0 - 84.0 cm
31.5" - 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||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|