Wilier Triestina Adlar geometryGravel · 2027 · 5 sizes, from XS to XL
The Wilier Triestina Adlar is a gravel bike available in 5 sizes, from XS to XL. Stack ranges from 538 to 634 mm and reach from 395 to 431 mm. Its geometry is low and long, with a racing fit. All sizes share 423 mm chainstays. Data from 2027; geometry from 2026, 2025, 2024 is also available.
What size Adlar 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 Wilier Triestina. The ones that matter most for choosing a size are in bold.
| Size | XS | S | M | L | XL |
|---|---|---|---|---|---|
| Stack | 538 | 562 | 586 | 610 | 634 |
| Reach | 395 | 404 | 413 | 422 | 431 |
| Effective top tube | 542 | 562 | 583 | 599 | 621 |
| Seat tube (centre-to-top) | 440 | 470 | 500 | 530 | 570 |
| Seat tube (centre-to-centre) | 380 | 410 | 440 | 470 | 510 |
| Head tube length | 79 | 104 | 130 | 155 | 181 |
| Head angle | 70.0° | 70.0° | 70.0° | 70.0° | 70.0° |
| Chainstay length | 423 | 423 | 423 | 423 | 423 |
| Wheelbase | 1,030 | 1,048 | 1,065 | 1,083 | 1,101 |
| Seat angle (method not stated) | 75.0° | 74.5° | 74.0° | 74.0° | 73.5° |
Source: Wilier Triestina 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 gravel bikes. Further right means more of that quality.
Bikes with similar geometry (size M)
The closest size of other gravel models, by stack and reach.
Frequently asked questions
What size Adlar 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 538/395 mm in size XS to 634/431 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 Adlar in size M?
Stack of 586 mm and reach of 413 mm, with an effective top tube of 583 mm and a head angle of 70.0°.
Is the Adlar a racing or an endurance bike?
Racing. In size M its stack-to-reach ratio is at percentile 19 of gravel bikes: a low, stretched position.