Trek Procaliber geometryMTB · 2025 · 5 sizes, from S to XL
The Trek Procaliber is a mtb bike available in 5 sizes, from S to XL. Stack ranges from 614 to 642 mm and reach from 405 to 500 mm. Its position sits between racing and endurance.
What size Procaliber do I need?
Enter the stack and reach of a bike that fits you well and we will tell you which size is closest and how to set it up.
Enter your stack and reach to see which size fits you best.
Geometry chart by size
Measurements in mm and degrees, as published by Trek. The ones that matter most for choosing a size are in bold.
| Size | S | M | ML | L | XL |
|---|---|---|---|---|---|
| Stack | 614 | 614 | 614 | 614 | 642 |
| Reach | 405 | 430 | 445 | 460 | 500 |
| Effective top tube | 577 | 598 | 613 | 628 | 677 |
| Head tube length | 90 | 90 | 90 | 90 | 120 |
| Head angle | 67.0° | 67.0° | 67.0° | 67.0° | 67.0° |
| Effective seat angle | 74.3° | 74.3° | 74.3° | 74.3° | 74.3° |
| Actual seat angle | 71.0° | 71.5° | 72.0° | 72.5° | 73.0° |
| Chainstay length | 430 | 430 | 435 | 435 | 440 |
| Wheelbase | 1,110 | 1,135 | 1,155 | 1,171 | 1,227 |
| BB drop | 64 | 64 | 64 | 64 | 64 |
| BB height | 309 | 309 | 309 | 309 | 309 |
| Fork offset | 43 | 43 | 43 | 43 | 43 |
| Standover | 747 | 749 | 758 | 763 | 791 |
| Seat tube (method not stated) | 390 | 420 | 440 | 460 | 510 |
Source: Trek official website · data from 11 Nov 2026. Spot a mistake?
Stack and reach of every size
Higher means a taller front end; further right means a longer reach. The blue dot is your search.
Character of each size
Compared with other mtb bikes. Further right means more of that quality.
Bikes with similar geometry (size ML)
The closest size of other mtb models, by stack and reach.
Frequently asked questions
What size Procaliber do I need?
It depends on your position, not just your height. The most reliable way is to compare the stack and reach of a bike that fits you with those of each size (from 614/405 mm in size S to 642/500 mm in size XL). The size finder on this page shows the closest size and the stem and spacers you would need.
What are the stack and reach of the Procaliber in size ML?
Stack of 614 mm and reach of 445 mm, with an effective top tube of 613 mm and a head angle of 67.0°.
Is the Procaliber a racing or an endurance bike?
In between. In size ML its stack-to-reach ratio is at percentile 50 of mtb bikes: neither very low nor very tall.