KTM Scarp Prime geometryMTB · 2027 · 4 sizes, from S to XL
The KTM Scarp Prime is a mtb bike available in 4 sizes, from S to XL. Stack ranges from 584.3 to 612 mm and reach from 438.9 to 491.7 mm. Its geometry is low and long, with a racing fit.
What size Scarp Prime 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 KTM. The ones that matter most for choosing a size are in bold.
| Size | S | M | L | XL |
|---|---|---|---|---|
| Stack | 584 | 594 | 603 | 612 |
| Reach | 439 | 457 | 474 | 492 |
| Head tube length | 95 | 105 | 115 | 125 |
| Head angle | 67.5° | 67.5° | 67.5° | 67.5° |
| Chainstay length | 435 | 435 | 435 | 435 |
| Wheelbase | 1,143 | 1,164 | 1,185 | 1,207 |
| BB drop | 45 | 45 | 45 | 45 |
| Standover | 792 | 797 | 802 | 807 |
| Top tube (method not stated) | 590 | 610 | 630 | 650 |
| Seat tube (method not stated) | 380 | 430 | 480 | 530 |
| Seat angle (method not stated) | 75.5° | 75.5° | 75.5° | 75.5° |
Source: KTM 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 M)
The closest size of other mtb models, by stack and reach.
Frequently asked questions
What size Scarp Prime 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 584.3/438.9 mm in size S to 612/491.7 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 Scarp Prime in size M?
Stack of 593.6 mm and reach of 456.5 mm.
Is the Scarp Prime a racing or an endurance bike?
Racing. In size M its stack-to-reach ratio is at percentile 16 of mtb bikes: a low, stretched position.