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Selling Fun for 25 Years
Trek X-Caliber 8 (2021) Lithium Grey/Trek Black
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 SRAM drivetrain, RockShox fork, and hydraulic disc b
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 SRAM 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 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.
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 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)
- The 1x drive train delivers a wide range of gearing with the simplicity of a single shifter
*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|
|Fork||RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, 42 mm offset, Boost110, 15 mm Maxle Lite, 100 mm travel|
|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: S, M, M/L, L, XL, XXL
Bontrager Kovee, double-wall, Tubeless Ready, 28-hole, 23 mm width, Presta valve
|Size: 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|
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"
|Shifter||SRAM SX Eagle, 12-speed|
|Rear derailleur||SRAM SX Eagle|
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|
|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
|Size: M/L, L, XL, XXL
Bontrager alloy, 31.6 mm, 12 mm offset, 400 mm length
|Handlebar||Bontrager alloy, 31.8 mm, 5 mm rise, 720 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
|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: S, M, M/L, L, XL, XXL
Shimano RT26, 160 mm, 6-bolt
|Size: L, XL, XXL
Shimano RT26, 180 mm, 6-bolt
|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 authorised 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 - 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|