Bianchi Arcadex geometryGravel · 2026 · 5 sizes, from XS to XL
The Bianchi Arcadex is a gravel bike available in 5 sizes, from XS to XL. Stack ranges from 544 to 638 mm and reach from 376 to 410 mm. Its position sits between racing and endurance.
What size Arcadex 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 Bianchi. The ones that matter most for choosing a size are in bold.
| Size | XS | SM | MD | LG | XL |
|---|---|---|---|---|---|
| Stack | 544 | 563 | 584 | 610 | 638 |
| Reach | 376 | 383 | 391 | 402 | 410 |
| Effective top tube | 527 | 545 | 564 | 583 | 605 |
| Head tube length | 90 | 110 | 130 | 155 | 185 |
| Head angle | 70.5° | 70.5° | 71.0° | 71.5° | 71.5° |
| Chainstay length | 430 | 430 | 430 | 430 | 432 |
| Wheelbase | 1,020 | 1,034 | 1,044 | 1,059 | 1,077 |
| Front centre | 601 | 615 | 625 | 639 | 656 |
| BB drop | 75 | 75 | 75 | 75 | 75 |
| Fork length | 425 | 425 | 425 | 425 | 425 |
| Fork offset | 51 | 51 | 51 | 51 | 51 |
| Seat tube (method not stated) | 410 | 448 | 485 | 515 | 550 |
| Seat angle (method not stated) | 74.5° | 74.0° | 73.5° | 73.5° | 73.0° |
Source: Bianchi 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 MD)
The closest size of other gravel models, by stack and reach.
Frequently asked questions
What size Arcadex 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 544/376 mm in size XS to 638/410 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 Arcadex in size MD?
Stack of 584 mm and reach of 391 mm, with an effective top tube of 564 mm and a head angle of 71.0°.
Is the Arcadex a racing or an endurance bike?
In between. In size MD its stack-to-reach ratio is at percentile 66 of gravel bikes: neither very low nor very tall.