Orbea Orca
Racers who want a climbing Orbea. Orca Aero is the wind-cheating sibling.
Orbea's lightweight race bike, OMX carbon on high kits, and a fit that is race-low without S5 drama. OMX vs OMR changes weight more than geometry.
Racers who want a climbing Orbea. Orca Aero is the wind-cheating sibling.
Orbea's lightweight race bike, OMX carbon on high kits, and a fit that is race-low without S5 drama. OMX vs OMR changes weight more than geometry.
Racers and fast club riders who want the modern Tarmac. If you came off an SL7, check that the stack/reach still matches your size.
The current Specialized race bike: lighter than SL7, still aero, and famously 'it just disappears' if the fit is right. Size by stack/reach — the 54/56 split is where a lot of riders hop.
| Measurement |  RadonVaillant 2019 | RadonVaillant 2018 |  OrbeaOrca 2023 |  SpecializedTarmac SL8 2026 |
|---|---|---|---|---|
| Stackmm | 551 | 551 | 552+1 | 544−7 |
| Reachmm | 388 | 388 | 385−3 | 384−4 |
| Head tube angle° | 73.0 | 73.0 | 72.8−0.2 | 73.0 |
| Seat tube angle° | 73.5 | 73.5 | 73.5 | 74.0+0.5 |
| Chainstaymm | 408 | 408 | 408 | 410+2 |
| Wheelbasemm | 991 | 991 | 981−10 | 978−13 |
| BB dropmm | 69 | 69 | 70+1 | 72+3 |
| BB heightmm | — | — | — | 268 |
| Standovermm | — | — | — | 768 |
| Part | Vaillant 56 | Vaillant 56 | Orca 53 | Tarmac SL8 54 |
|---|---|---|---|---|
| Stem | 100 mm | 100 mm | 90 mm | 100 mm |
| Bar | 420 mm | 420 mm | 400 mm | 420 mm |
| Crank | 172.5 mm | 172.5 mm | 170 mm | 172.5 mm |
Orbea has dropped many of the aero optimisations of the previous Orca, while it has unified the geometry across the OMX and OMR-tier frames.
Orbea says, “the Orca is around 3W faster than an aero bike, for an average rider, on a 5% slope, and around 6W faster on a 10% slope.” The Orca OMX has claimed ...
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