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It's right for you if...
You're building a mountain bike for fast rides on singletrack rides or XC races, and you're looking for all the speed you can get for your money. Or you're setting up a rugged commuter and need rack mounts and the durability to get rad on the way to work or class.
The tech you get
A lightweight Alpha Gold Aluminium frame with short chainstays for agility on winding XC singletrack trails, rack and kickstand mounts for carrying your gear if your MTB doubles as your rugged commuter and an included headset. Boost141 spacing.
The final word
Quick, nimble, efficient and affordable. X-Caliber frame set gives you an exceptional amount of speed, durability, and performance in a high-value hardtail mountain bike frame you can spec exactly the way you want.
The Walkthrough
favorite_borderWhy you'll love it
- It gets you into the world of cross-country riding and racing at a great price, and it's a mountain bike that can grow with you as your skills advance
- The sleek internal cable routing gives you clean looks, protects your cables and makes it easy to upgrade to a dropper post for even more capability
- The frame is fully compatible with higher-end parts, like race wheels and a dropper post
- Mounts on the frame make it easy to add a rear rack if your XC bike doubles as your daily commuter
How to: Remove and install wheels
From transporting on a rack to fixing a flat, sometimes those wheels need to come off your bike. Keep watching to learn how to safely remove and install wheels that use a quick-release system.
Watch the video
How to: Wash your bike
A clean bike is a happy bike, but washing your ride is a bit more complicated than a quick spray with the hose or a joyride through your local car wash. Follow our step-by-step process and you’ll learn the dos and don’ts of keeping your bike in tip-top shape!
Watch the video
How to: Pump your tyres
Setting your bike's tyre pressure correctly will give you a more comfortable ride with better grip and handling. Even better, it can help prevent flats
Watch the video
How to: Fix a flat tyre
Flat? Fixed. Our simple how-to video will show you how to get back on two wheels in no time flat.
Watch the videoFeatures
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.
Smart Wheel Size
The right wheel size paired with your frame size gives you the perfect combination of responsiveness and control.
Internal cable routing
We route shift and brake cables through the frame to keep things clean and simple. And it looks great, too.
Rack mounts
Going for a long ride? Rack mounts make carrying accessories a breeze.
Rear kickstand mount
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 dropper compatible
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.
Specifications
*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 |
|---|---|
| Max compatible fork travel | 120mm (XS: 100mm) |
| Max tyre size | 27.5x2.80" or 29x2.40" |
|---|
| Max. chainring size | 32T |
|---|
| Head set | Semi-integrated, loose ball bearing, 1-1/8" top, 1.5" bottom |
|---|
| Weight | M - 2.17 kg / 4.78 lb |
|---|---|
| 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 retailer, where an expert skilled at sizing will help you find the appropriate bike and size for your individual needs.
Rider Height
Inseam
XS
137.0 - 155.0 cm
4'5.9" - 5'1.0"
64.0 - 73.0 cm
25.2" - 28.7"
S
153.0 - 166.5 cm
5'0.2" - 5'5.6"
72.0 - 79.0 cm
28.3" - 31.1"
M
161.0 - 175.0 cm
5'3.4" - 5'8.9"
76.0 - 82.0 cm
29.9" - 32.3"
L
174.0 - 188.0 cm
5'8.5" - 6'2.0"
82.0 - 88.0 cm
32.3" - 34.6"
XL
186.0 - 196.0 cm
6'1.2" - 6'5.2"
87.0 - 92.0 cm
34.3" - 36.2"
2XL
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |