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Trek X-Caliber 8

Trek X-Caliber 8
Color: Satin Lithium Grey
Size: Select size
Wheel Size: Select wheel size
Please select options Unavailable


X-Caliber 8 is a cross country mountain bike made for fast laps and long days on the trail. It's built with special attention to value and the parts that make the biggest difference in performance. A 1x Shimano drivetrain, RockShox fork, and hydraulic disc brakes make it a great choice for new mountain bikers and XC racers searching for fast, fun, singletrack adventure.

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 aluminum frame, a RockShox Judy SL 100mm 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 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.

Why 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

Wheel size:
- Sizes X-Small – Small: 27.5-inch
- Sizes Medium – XX-Large: 29-inch

bike frame with labeled dimensions
Bike Sizes:
A. Reach 37.6cm 38.5cm 41.8cm 43.4cm 45.1cm 46.6cm 48cm
B. Stack 56.5cm 57.4cm 59.8cm 59.8cm 60.8cm 62.7cm 62.7cm
C. Standover 69.8cm 72.4cm 74.8cm 75.7cm 75.7cm 76.8cm 80.4cm
D. Effective Top Tube 54.4cm 55.5cm 60.1cm 61.7cm 63.7cm 65.8cm 67.2cm
E. Head Tube Angle 69.3° 69.3° 69.5° 69.5° 69.5° 69.5° 69.5°
F. Head Tube Length 9cm 9cm 9cm 9cm 10cm 12cm 12cm
G. Seat Tube Angle 73.5° 73.5° 71.9° 71.9° 71.9° 71.9° 71.9°
H. Seat Tube Length 34.3cm 36.8cm 41.9cm 44.4cm 47cm 52.1cm 55.9cm
I. Bottom Bracket Height 29.2cm 30.2cm 31.1cm 31cm 31cm 31cm 31.1cm
J. Bottom Bracket Drop 5.8cm 4.8cm 5.8cm 5.8cm 5.8cm 5.8cm 5.8cm
K. Fork Rake/Offset 4.2cm 4.2cm 4.2cm 4.2cm 4.2cm 4.2cm 4.2cm
L. Trail 8.8cm 8.8cm 9.4cm 9.4cm 9.4cm 9.4cm 9.4cm
M. Wheelbase 103.6cm 105.3cm 110.9cm 112.5cm 114.5cm 116.7cm 118.1cm
O. Chainstay Length 42.5cm 42.5cm 43.8cm 43.8cm 43.8cm 43.8cm 43.8cm


Frame Alpha Gold Aluminum, tapered head tube, internal derailleur & dropper post routing, rack & kickstand mount, Boost141
Fork RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, 42mm offset, Boost110
Headset Semi-integrated, loose ball bearing, 1-1/8" top, 1.5" bottom
Axles Front: 110 x 15mm thru axle
Rear: 141 x 5mm QR
Rims/Wheels Bontrager Kovee, double-wall, Tubeless Ready, 23mm width, presta valve
Hubs Front: Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle
Rear: Formula DCL-141Q, sealed bearing, 6-bolt, Shimano 10 freehub, Boost141
Spokes 14g stainless steel
Tires Size XS, S: Maxxis Ardent Race, tubeless, EXO casing, folding bead, 60tpi, 27.5 x 2.35"
Size M, M/L, L, XL, XXL: Maxxis Ardent Race, tubeless, EXO casing, folding bead, 60tpi, 29 x 2.35"
Crankset Shimano MT511, 30T steel ring, Boost (52mm chainline)
Bottom Bracket Shimano SM-BB52, 73mm, threaded external bearing
Chain Shimano Deore M6100, 12 speed
Rear Derailleur SRAM SX Eagle
Cassette/Rear Cogs Shimano Deore M6100, 10-51, 12 speed
Shifters Shimano Deore M6100, 12 speed
Handlebars Bontrager alloy, 31.8mm, 5mm rise
Tape/Grips Bontrager XR Trail Comp, nylon lock-on
Stem Bontrager Elite, 31.8mm, Blendr compatible, 7 degree
Brakes Shimano MT200 hydraulic disc w/Shimano RT26, 6-bolt rotors
Pedals VP-536 nylon platform
Saddle Bontrager Arvada, steel rails, 138mm width
Seat Post Bontrager alloy, 31.6mm, 12mm offset

* Subject to change without notice.

Part Numbers

Option UPC MPN Store SKU
Satin Lithium Grey / X-Small / 27.5-inch 601842581841 5259715 XCA27433747Y
Satin Lithium Grey / XX-Large / 29-inch 601842581780 5259721 XCA28387858Y