Trek X-Caliber Frameset
Trek / Cross Country Mountain Bikes
Quick on the trail. Easy to love.
X-Caliber Frameset is a lightweight alloy platform built for fast, fun singletrack. Its Alpha Gold Aluminum frame features modern XC geometry and short chainstays for agile handling, along with mounts for racks and a kickstand. It’s a versatile starting point for building a cross-country bike that’s just as comfortable on trails as it is on everyday rides.
Based on the bike's size chart. Your complimentary baseline fit in store dials in the rest.
Ship to store · free pickup, usually ready in 4–7 business days
Questions are welcome. No pressure, no bike jargon required.
The ride, not just the specs
X-Caliber is a fast, light hardtail for riders who want a little more speed on the trail. It climbs well, rolls fast, and keeps up when the ride picks up.
It's a great bike for cross-country loops and your first races.
What makes it special
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.
For the detail-oriented
Tap any group to see every part.
Measurements in cm unless noted.
| Size | XS | S | M | ML | L | XL | XXL |
|---|---|---|---|---|---|---|---|
| Rider height | 4'9"–5'1" | 5'1"–5'5" | 5'5"–5'10" | 5'8"–5'11" | 5'10"–6'2" | 6'2"–6'5" | |
| Seat tube (A on the drawing) | 34.3 | 36.8 | 41.9 | 44.4 | 47.0 | 52.1 | 55.9 |
| Seat tube angle (B on the drawing) | 73.5° | 73.5° | 71.9° | 71.9° | 71.9° | 71.9° | 71.9° |
| Head tube length (C on the drawing) | 9.0 | 9.0 | 9.0 | 9.0 | 10.0 | 12.0 | 12.0 |
| Head tube angle (D on the drawing) | 69.3° | 69.3° | 69.5° | 69.5° | 69.5° | 69.5° | 69.5° |
| Eff. top tube (E on the drawing) | 54.4 | 55.5 | 60.1 | 61.7 | 63.7 | 65.8 | 67.2 |
| BB height (F on the drawing) | 29.2 | 30.2 | 31.1 | 31.0 | 31.0 | 31.0 | 31.1 |
| BB drop (G on the drawing) | 5.8 | 4.8 | 5.8 | 5.8 | 5.8 | 5.8 | 5.8 |
| Chainstay length (H on the drawing) | 42.5 | 42.5 | 43.8 | 43.8 | 43.8 | 43.8 | 43.8 |
| Offset (I on the drawing) | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 |
| Trail (J on the drawing) | 8.8 | 8.8 | 9.4 | 9.4 | 9.4 | 9.4 | 9.4 |
| Wheelbase (K on the drawing) | 103.6 | 105.3 | 110.9 | 112.5 | 114.5 | 116.7 | 118.1 |
| Standover (L on the drawing) | 69.8 | 72.4 | 74.8 | 75.7 | 75.7 | 76.8 | 80.4 |
| Reach (M on the drawing) | 37.6 | 38.5 | 41.8 | 43.4 | 45.1 | 46.6 | 48.0 |
| Stack (N on the drawing) | 56.5 | 57.4 | 59.8 | 59.8 | 60.8 | 62.7 | 62.7 |
| Frame size | 13.5" | 15.5" | 17.5" | 18.5" | 19.5" | 21.5" | 23.0" |
| Wheel size | 27.5" | 27.5" | 29" | 29" | 29" | 29" | 29" |
| Eff. seat tube angle | 73.5° | 73.5° | 73.0° | 73.0° | 73.0° | 73.0° | 73.0° |
The Atlanta Cycling difference
Specs matter. But so does how a bike feels when you ride it. Our team is here to help you choose the right size, understand the details, and get comfortable before your first ride.
When you buy from Atlanta Cycling, you're not just getting a box with a bicycle in it. You're getting a 30-day money-back guarantee, a complimentary baseline fit, lifetime basic adjustments, and real people who want you to love every mile.
Four neighborhood stores. One shared passion.
Ansley. Alpharetta. Roswell. Vinings. Stop by, take a test ride, ask questions, and meet the people who will be here long after your first ride.
