Colnago Y1Rs geometryRoad · 2026 · 5 sizes, from XS to XL
The Colnago Y1Rs is a road bike available in 5 sizes, from XS to XL. Stack ranges from 495 to 590 mm and reach from 368 to 404 mm. Its geometry is low and long, with a racing fit. All sizes share 408 mm chainstays.
What size Y1Rs 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 Colnago. The ones that matter most for choosing a size are in bold.
| Size | XS | S | M | L | XL |
|---|---|---|---|---|---|
| Stack | 495 | 520 | 540 | 565 | 590 |
| Reach | 368 | 377 | 386 | 395 | 404 |
| Head tube length | 89 | 109 | 127 | 151 | 177 |
| Head angle | 70.8° | 71.9° | 73.0° | 73.5° | 73.5° |
| Effective seat angle | 75.0° | 74.5° | 74.0° | 73.7° | 73.0° |
| Chainstay length | 408 | 408 | 408 | 408 | 408 |
| Front centre | 578 | 580 | 581 | 590 | 606 |
| BB drop | 74 | 74 | 72 | 72 | 72 |
| Fork length | 377 | 377 | 377 | 377 | 377 |
| Fork offset | 55 | 50 | 45 | 43 | 43 |
| Trail | 61 | 60 | 58 | 57 | 57 |
Source: Colnago 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 Y1Rs 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 495/368 mm in size XS to 590/404 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 Y1Rs in size M?
Stack of 540 mm and reach of 386 mm.
Is the Y1Rs a racing or an endurance bike?
Racing. In size M its stack-to-reach ratio is at percentile 26 of road bikes: a low, stretched position.
Does it have the same geometry as the CAAD14?
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.