Orbea Orca Aero 2025 geometry
Size chart for fitting. If this bike already feels right, find others with a similar riding position (size 47). Category: road-aero.
| Size | Stack | Reach | Head tube angle | Seat tube angle | Chainstay | Wheelbase | BB drop |
|---|---|---|---|---|---|---|---|
| 47 | 496 mm | 372 mm | 71.0° | 74.5° | 408 mm | 970 mm | 70 mm |
| 49 | 506 mm | 377 mm | 71.5° | 74.0° | 408 mm | 974 mm | 70 mm |
| 51 | 524 mm | 382 mm | 72.2° | 73.7° | 408 mm | 978 mm | 70 mm |
| 53 | 542 mm | 388 mm | 72.8° | 73.5° | 408 mm | 980 mm | 68 mm |
| 55 | 562 mm | 394 mm | 73.0° | 73.5° | 408 mm | 990 mm | 68 mm |
| 57 | 580 mm | 401 mm | 73.2° | 73.2° | 408 mm | 1001 mm | 68 mm |
| 60 | 606 mm | 407 mm | 73.2° | 73.2° | 408 mm | 1015 mm | 68 mm |
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Size guidance
Stack and reach describe the frame's cockpit envelope better than traditional seat-tube sizing. If you know your preferred stack/reach from a bike that already fits, search within a few millimeters first, then check head angle and chainstay for handling feel. See the glossary for stack, reach, and HTA.