KTM Revelator Alto Pro geometryRoad · 2027 · 5 sizes, from XS to XL
The KTM Revelator Alto Pro is a road bike available in 5 sizes, from XS to XL. Stack ranges from 519 to 571 mm and reach from 361 to 396 mm. Its position sits between racing and endurance. All sizes share 410 mm chainstays.
What size Revelator Alto Pro 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 | XS | S | M | L | XL |
|---|---|---|---|---|---|
| Stack | 519 | 535 | 550 | 559 | 571 |
| Reach | 361 | 377 | 387 | 392 | 396 |
| Head tube length | 115 | 130 | 145 | 155 | 170 |
| Head angle | 71.5° | 72.0° | 72.0° | 72.5° | 72.5° |
| Chainstay length | 410 | 410 | 410 | 410 | 410 |
| Wheelbase | 960 | 976 | 991 | 995 | 1,004 |
| BB drop | 72 | 72 | 72 | 70 | 68 |
| Standover | 733 | 757 | 778 | 794 | 811 |
| Top tube (method not stated) | 510 | 530 | 550 | 563 | 576 |
| Seat tube (method not stated) | 440 | 470 | 500 | 520 | 540 |
| Seat angle (method not stated) | 74.0° | 74.0° | 73.5° | 73.0° | 72.5° |
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 road bikes. Further right means more of that quality.
Bikes with similar geometry (size M)
The closest size of other road models, by stack and reach.
Frequently asked questions
What size Revelator Alto Pro 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 519/361 mm in size XS to 571/396 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 Revelator Alto Pro in size M?
Stack of 550 mm and reach of 387 mm.
Is the Revelator Alto Pro a racing or an endurance bike?
In between. In size M its stack-to-reach ratio is at percentile 38 of road bikes: neither very low nor very tall.
Does it have the same geometry as the Revelator Alto Prestige?
In size M, yes: same stack and reach. If one already fits you, the same size of the other will put you in the same position.