X-Caliber Frameset | Trek Bikes
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2019

X-Caliber Frameset

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$589.99 Model 21578

X-Caliber Frameset is a high-value alloy mountain bike frameset for fast singletrack rides. Lightweight Alpha Aluminum 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 Aluminum 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

More options



Features

Specifications

  • Frameset

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

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

    Weight
    17.5˝ - 1.93 kg / 4.25 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, and materials.
Bike and frame weights are based off Trek pre-production painted frames at time of publication. Weights may vary in final production.

Sizing & fit

The charts below show our recommended sizes based on height, but there are some other factors, like arm and leg length, that determine a great fit. That’s why you’ll see some overlap in our recommendations. Not every rider who’s 5´8˝, for example, will fit on the same size bike. The best way to find your perfect fit is to consult the experts at your local Trek retailer.

 

Rider Height

Inseam

All measurements provided in cm unless otherwise noted.

Frame size number 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 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 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 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 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 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 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 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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