Orbea Orca Aero geometryRoad · 2027 · 7 sizes, from 47 to 60
The Orbea Orca Aero is a road bike available in 7 sizes, from 47 to 60. Stack ranges from 495 to 604 mm and reach from 370 to 404 mm. Its geometry is low and long, with a racing fit. All sizes share 408 mm chainstays.
What size Orca Aero 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 Orbea. The ones that matter most for choosing a size are in bold.
| Size | 47 | 49 | 51 | 53 | 55 | 57 | 60 |
|---|---|---|---|---|---|---|---|
| Stack | 495 | 504 | 520 | 540 | 560 | 578 | 604 |
| Reach | 370 | 375 | 380 | 385 | 390 | 397 | 404 |
| Effective top tube | 505 | 518 | 530 | 543 | 555 | 571 | 584 |
| Seat tube (centre-to-top) | 459 | 474 | 499 | 524 | 545 | 565 | 592 |
| Head tube length | 84 | 92 | 107 | 122 | 145 | 163 | 190 |
| Head angle | 70.8° | 71.3° | 72.2° | 72.8° | 73.0° | 73.2° | 73.2° |
| Chainstay length | 408 | 408 | 408 | 408 | 408 | 408 | 408 |
| Wheelbase | 966 | 971 | 973 | 974 | 985 | 995 | 1,009 |
| BB drop | 78 | 78 | 78 | 78 | 76 | 76 | 76 |
| Fork length | 368 | 368 | 368 | 368 | 368 | 368 | 368 |
| Fork offset | 48 | 48 | 48 | 43 | 43 | 43 | 43 |
| Trail | 69 | 65 | 60 | 61 | 60 | 59 | 59 |
| Standover | 723 | 734 | 754 | 776 | 798 | 816 | 842 |
| Seat angle (method not stated) | 74.5° | 74.0° | 73.7° | 73.5° | 73.5° | 73.2° | 73.2° |
Source: Orbea 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 53)
The closest size of other road models, by stack and reach.
Frequently asked questions
What size Orca Aero 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 495/370 mm in size 47 to 604/404 mm in size 60). 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 Orca Aero in size 53?
Stack of 540 mm and reach of 385 mm, with an effective top tube of 543 mm and a head angle of 72.8°.
Is the Orca Aero a racing or an endurance bike?
Racing. In size 53 its stack-to-reach ratio is at percentile 27 of road bikes: a low, stretched position.