X-Caliber 8

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.

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.

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.

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

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X-Caliber Frameset

$749.99

The story of two NICA student athletes and BFFs.

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Bontrager Rally WaveCel Mountain Bike Helmet

$79.99 $159.99

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Fox Racing Ranger Mountain Bike Short with Liner

$59.93 $99.95

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Bontrager Rapid Pack

$64.99 - $67.99

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Bontrager Evoke Mountain Bike Glove

$12.93 $30.99

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Bontrager Evoke Women's Mountain Bike Tech Tee

$9.99 $39.99

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Bontrager Quantum Women's Full Finger Cycling Glove

$12.99 $36.99

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The Alpha Gold Aluminum 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 out back.

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.

Shimano XT is the original mountain bike groupset and trusted by generations of mountain bikers around the world. Whatever the trail, wherever you ride, XT is your solution for mountain biking today. Reliable shifting. Superior braking. Intuitive maintenance. XT is the high performance workhorse you can count on.

Pedals are two of the five touchpoints that connect you with your bike, and even though this bike comes with a pair, upgrading to pedals that boost control and grip will greatly improve your ride. See the pedal guide and find the best pedals for your riding style. We recommend flat pedals for simple versatility.

See the guide

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.

We route shift and brake cables through the frame to keep things clean and simple. And it looks great, too.

Bontrager Blendr stem technology lets you clip your gear directly to the stem for clean looks, maximum user friendliness.

Learn more

Going for a long ride? Rack mounts make carrying accessories a breeze.

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 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.

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*Please note - spec applies to all sizes unless listed separately

Frame	Alpha Gold Aluminum, tapered head tube, internal derailleur & dropper post routing, rack & kickstand mount, Boost141, 5mm QR
*Fork	Size: XS RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, 42mm offset, Boost110, 15mm Maxle Lite, 80mm travel
	Size: S RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, Boost110, 15mm Maxle Lite, 100mm travel
	Size: M, ML, L, XL, XXL RockShox Judy SL, Solo Air spring, TurnKey lockout, tapered steerer, 42mm offset, Boost110, 15mm Maxle Stealth, 100mm travel
Max compatible fork travel	120mm, XS: 100mm

Hub front	Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15mm thru axle
Hub rear	Bontrager alloy, sealed bearing, 6-bolt, Shimano MicroSpline freehub, Boost141, 5mm QR
*Rim	Size: XS, S, M, ML, L, XL, XXL Bontrager Kovee, double-wall, Tubeless Ready, 28-hole, 23mm width, Presta valve
*Rim	Size: XS, S, M, ML, L, XL, XXL Bontrager Kovee, double-wall, Tubeless Ready, 32-hole, 23mm width, Presta valve
Spokes	14g stainless steel, black
*Tire	Size: XS, S Maxxis Ardent Race, tubeless ready, EXO casing, folding bead, 60tpi, 27.5x2.35''
*Tire	Size: M, ML, L, XL, XXL Maxxis Ardent Race, tubeless ready, EXO casing, folding bead, 60tpi, 29x2.35''
Tire part	Bontrager TLR sealant, 6oz
Rim strip	Bontrager TLR
Max tire size	Frame: 27.5x2.80" or 29x2.40", Fork: See manufacturer

Shifter	Shimano Deore M6100, 12 speed
Rear derailleur	Shimano XT M8100, long cage
*Crank	Size: XS, S, M Shimano MT511, 30T steel ring, 52mm chainline, 170mm length
*Crank	Size: ML, L, XL, XXL Shimano MT511, 30T steel ring, 52mm chainline, 175mm length
*Bottom bracket	Size: XS, S, M, ML, L, XL, XXL Shimano BB-MT501 BSA
*Bottom bracket	Size: XS, S, M, ML, L, XL, XXL Shimano SM-BB52, 73mm, 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	1x: 32T

Saddle	Bontrager Arvada, steel rails, 138mm width
*Seatpost	Size: XS, S Bontrager alloy, 31.6mm, 12mm offset, 330mm length
	Size: M Bontrager alloy, 31.6mm, 12mm offset, 360mm length
	Size: ML, L, XL, XXL Bontrager alloy, 31.6mm, 12mm offset, 400mm length
*Handlebar	Size: XS Bontrager alloy, 31.8mm, 5mm rise, 690mm width
	Size: S, M Bontrager alloy, 31.8mm, 5mm rise, 720mm width
	Size: ML, L, XL, XXL Bontrager alloy, 31.8mm, 15mm rise, 750mm width
Grips	Bontrager XR Trail Comp, nylon lock-on
*Stem	Size: XS, S Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 60mm length
	Size: M, ML Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 70mm length
	Size: L Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 80mm length
	Size: XL, XXL Bontrager Elite, 31.8mm, Blendr compatible, 7 degree, 90mm length
Headset	Semi-integrated, loose ball bearing, 1-1/8'' top, 1.5'' bottom
Brake	Shimano MT200 hydraulic disc
*Brake rotor	Size: XS, S, M, ML, L, XL, XXL Shimano RT26, 6-bolt, 160mm
*Brake rotor	Size: L, XL, XXL Shimano RT26, 6-bolt, 180mm
Brake Set	Shimano MT200 hydraulic disc

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 300 pounds (136 kg).

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, materials, and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice. Prices shown are manufacturer's suggested retail prices.

Bike and frame weights are based off pre-production painted frames at time of publication. Weights may vary in final production.

How tall are you?

To measure your height, stand straight up, barefoot, with your back, heels, shoulders and head all touching a wall. While looking straight ahead, place a book or straight edge on your head and slowly push it against the wall. Your straight edge should be parallel with the floor. Mark the spot where the bottom of the book is touching the wall. The distance from the marked spot to the floor is your height.

What is your inseam?

How to measure: Stand barefoot with your back straight and against a wall. Tuck a ruler or something that extends to the floor between your legs. Using both hands, and keeping it level, pull the ruler up into your crotch as if you were sitting on the saddle. Measure the distance from the top edge of the ruler to the ground to find your inseam measurement. Your inseam is very important to your final bike size so please measure carefully.

size-table
Size	Rider Height	Inseam
XS	145 - 155 cm 4'9" - 5'1"	69 - 73 cm 27" - 29"
S	155 - 165 cm 5'1" - 5'5"	74 - 78 cm 29" - 31"
M	165 - 176 cm 5'5" - 5'9"	79 - 83 cm 31" - 33"
ML	173 - 180 cm 5'8" - 5'11"	81 - 86 cm 32" - 34"
L	177 - 188 cm 5'10" - 6'2"	84 - 89 cm 33" - 35"
XL	188 - 195 cm 6'2" - 6'5"	89 - 91 cm 35" - 36"
2XL	195 - 203 cm 6'5" - 6'8"	91 - 97 cm 36" - 38"

All measurements provided in cm unless otherwise noted.

Sizing table
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

Model 35069

References

FAQ – 2020 X-Caliber
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Guide - Bontrager fender, rack & kickstand compatibility chart
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Guide - Blendr compatibility
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