Ridley X-Night RS geometryCyclocross · 2024 · 4 sizes, from XS to L
The Ridley X-Night RS is a cyclocross bike available in 4 sizes, from XS to L. Stack ranges from 497 to 573 mm and reach from 382 to 405 mm. Its geometry is low and long, with a racing fit. All sizes share 425 mm chainstays.
What size X-Night RS 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 Ridley. The ones that matter most for choosing a size are in bold.
| Size | XS | S | M | L |
|---|---|---|---|---|
| Stack | 497 | 526 | 552 | 573 |
| Reach | 382 | 384 | 391 | 405 |
| Effective top tube | 520 | 535 | 555 | 575 |
| Head tube length | 90 | 115 | 140 | 160 |
| Head angle | 71.5° | 72.0° | 72.0° | 72.0° |
| Chainstay length | 425 | 425 | 425 | 425 |
| Wheelbase | 1,000 | 1,006 | 1,020 | 1,040 |
| BB drop | 53 | 60 | 62 | 64 |
| Seat tube (method not stated) | 475 | 495 | 535 | 550 |
| Seat angle (method not stated) | 74.5° | 74.0° | 73.5° | 73.5° |
Source: Ridley 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 cyclocross bikes. Further right means more of that quality.
Bikes with similar geometry (size S)
The closest size of other cyclocross models, by stack and reach.
Frequently asked questions
What size X-Night RS 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 497/382 mm in size XS to 573/405 mm in size L). 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 X-Night RS in size S?
Stack of 526 mm and reach of 384 mm, with an effective top tube of 535 mm and a head angle of 72.0°.
Is the X-Night RS a racing or an endurance bike?
Racing. In size S its stack-to-reach ratio is at percentile 9 of cyclocross bikes: a low, stretched position.