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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 Aluminium frame, a RockShox 30 Silver 100 mm suspension fork with a lockout and an air spring that's lighter and more adjustable than a coil spring, tubeless-ready wheels with Boost141 hub spacing and a smooth, efficient SRAM SX Eagle 1x12 drive train 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.

The Walkthrough

favorite_borderWhy you'll love it

  1. It has the price of a more basic hardtail, but the parts and performance of a more expensive one
  2. 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
  3. The frame is fully compatible with higher-end parts, like race wheels and a dropper post, if you ever find the need to upgrade
  4. Smart Wheel Sizing means you'll get the fastest wheel that fits (29˝ wheels on larger frames, 27.5˝ wheels on smaller frames)
  5. The 1x drive train delivers a wide range of gearing with the simplicity of a single shifter


Features

Built for speed

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.

High tech frame

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.

Specifications

*spec applies to all sizes unless otherwise noted

Frameset
Frame Alpha Gold Aluminium, tapered head tube, internal derailleur and dropper post routing, rack and kickstand mount, Boost141, 5 mm QR
*Fork Size: XS
RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, 42 mm offset, Boost110, 15 mm Maxle Lite, 80 mm travel
Size: S, M, M/L, L, XL, XXL
RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, Boost110, 15 mm Maxle Stealth, 100 mm travel
Wheels
Front hub Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15 mm thru axle
Rear hub Formula DCL-141Q, sealed bearing, 6-bolt, Shimano 10 freehub, Boost141, 5 mm QR
*Rim Size: XS, S, M, M/L, L, XL, XXL
Bontrager Kovee, double-wall, Tubeless Ready, 28-hole, 23 mm width, Presta valve
Size: XS, S, M, M/L, L, XL, XXL
Bontrager Kovee, double-wall, Tubeless Ready, 32-hole, 23 mm width, Presta valve
Spokes 14 g stainless steel, black
*Tyre Size: XS, S
Bontrager XR3 Comp, wire bead, 30 tpi, 27.5x2.20''
Size: M, M/L, L, XL, XXL
Bontrager XR3 Comp, wire bead, 30 tpi, 29x2.20"
Drivetrain
Shifter SRAM SX Eagle, 12-speed
Rear derailleur SRAM SX Eagle
*Crank Size: XS, S
SRAM SX Eagle, GXP, 30T steel ring, Boost, 170 mm length
Size: M, M/L, L, XL, XXL
SRAM SX Eagle, GXP, 30T steel ring, Boost, 175 mm length
Bottom bracket Truvativ Powerspline, 73 mm, threaded cartridge, 118 mm spindle
Cassette SRAM PG-1210 Eagle, 11-50, 12-speed
Chain SRAM SX Eagle, 12-speed
Pedal VP-536 nylon platform
Components
Saddle Bontrager Arvada, steel rails, 138 mm width
*Seatpost Size: XS, S
Bontrager alloy, 31.6 mm, 12 mm offset, 330 mm length
Size: M
Bontrager alloy, 31.6 mm, 12 mm offset, 360 mm length
Size: M/L, L, XL, XXL
Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length
*Handlebar Size: XS
Bontrager alloy, 31.8 mm, 5 mm rise, 690 mm width
Size: S, M, M/L, L, XL, XXL
Bontrager alloy, 31.8 mm, 5 mm rise, 720 mm width
Grips Bontrager XR Trail Comp, nylon lock-on
*Stem Size: XS, S
Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 60 mm length
Size: M
Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 70 mm length
Size: M/L, L
Bontrager Elite, 31.8 mm, Blendr-compatible, 7-degree, 80 mm length
Size: XL, XXL
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
*Brake rotor Size: XS, S, M, M/L, L, XL, XXL
Shimano RT26, 160 mm, 6-bolt
Size: L, XL, XXL
Shimano RT26, 180 mm, 6-bolt
Weight
Weight M - 13.80 kg / 30.42 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).
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, and materials.
Bike and frame weights are based on Trek pre-production painted frames at the time of publication. Weights may vary in final production

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 authorised Trek retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.

 

Rider Height

Inseam

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
13.5 XS 27.5" 34.3 73.5° 73.5° 9.0 69.3° 54.4 29.2 5.8 42.5 4.2 8.8 103.6 69.8 37.6 56.5
15.5 S 27.5" 36.8 73.5° 73.5° 9.0 69.3° 55.5 30.2 4.8 42.5 4.2 8.8 105.3 72.4 38.5 57.4
17.5 M 29" 41.9 71.9° 73.0° 9.0 69.5° 60.1 31.1 5.8 43.8 4.2 9.4 110.9 74.8 41.8 59.8
18.5 ML 29" 44.4 71.9° 73.0° 9.0 69.5° 61.7 31.0 5.8 43.8 4.2 9.4 112.5 75.7 43.4 59.8
19.5 L 29" 47.0 71.9° 73.0° 10.0 69.5° 63.7 31.0 5.8 43.8 4.2 9.4 114.5 75.7 45.1 60.8
21.5 XL 29" 52.1 71.9° 73.0° 12.0 69.5° 65.8 31.0 5.8 43.8 4.2 9.4 116.7 76.8 46.6 62.7
23.0 XXL 29" 55.9 71.9° 73.0° 12.0 69.5° 67.2 31.1 5.8 43.8 4.2 9.4 118.1 80.4 48.0 62.7

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