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2019

X-Caliber Frame Set

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Model 21578

X-Caliber Frameset is a high-value alloy mountain bike frameset for fast singletrack rides. Lightweight Alpha Aluminium tubes, shorter chainstays for extra agility and an incredible amount of versatility make it a high-value starting point for your cross-country mountain bike.

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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 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 Frameset 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

  1. 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
  2. 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
  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. Mounts on the frame make it easy to add a rear rack if your XC bike doubles as your daily commuter


Features

Specifications

  • Frameset

    Frame
    Alpha Gold Aluminium, tapered head tube, internal derailleur and dropper post routing, rack and kickstand mount, Boost141, G2 Geometry
  • Components

    Head set
    Semi-integrated, cartridge, 1-1/8˝ top, 1.5˝ bottom
  • Weight

    Weight
    M – 1.93 kg/4.25 lbs
    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 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 in XS 27.5" 34.3 73.0° 9.0 69.2° 53.8 29.6 5.8 42.5 4.4 8.7 103.6 70.8 37.5 56.6
15.5 in S 27.5" 36.8 71.7° 9.0 69.2° 56.4 30.6 4.8 42.5 4.4 8.7 105.4 72.8 38.4 57.5
17.5 in M 29" 41.9 72.0° 9.0 69.3° 59.8 31.6 5.8 43.8 5.1 8.6 111.0 74.3 41.6 60.0
18.5 in ML 29" 44.4 72.0° 9.0 69.3° 61.4 31.6 5.8 43.8 5.1 8.6 112.6 73.7 43.2 60.0
19.5 in L 29" 47.0 72.0° 10.0 69.3° 63.4 31.6 5.8 43.8 5.1 8.6 114.7 75.3 44.9 60.9
21.5 in XL 29" 52.1 72.0° 12.0 69.3° 65.5 31.6 5.8 43.8 5.1 8.6 116.9 75.1 46.4 62.8
23 in XXL 29" 55.9 72.0° 12.0 69.3° 66.9 31.6 5.8 43.8 5.1 8.6 118.3 77.3 47.8 62.8

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