Orbea Orca Aero
Fast road riders who want Orbea aero. Orca if you care more about weight.
Aero Orbea race bike. Deeper tubes than Orca, same size run so many riders can twin the two on stack/reach.
Fast road riders who want Orbea aero. Orca if you care more about weight.
Aero Orbea race bike. Deeper tubes than Orca, same size run so many riders can twin the two on stack/reach.
Racers who want BMC aero without a full time-trial bike.
The aero-leaning Teammachine. Race position with more wind-cheating than SLR. New in the mid-2020s catalog window.
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 |  BoardmanSLR 2022 |  OrbeaOrca Aero 2022 |  |  SpecializedTarmac SL8 2026 |
|---|---|---|---|---|
| Stackmm | 562 | 542−20 | 562 | 544−18 |
| Reachmm | 394 | 388−6 | 394 | 384−10 |
| Head tube angle° | 73.0 | 72.8−0.2 | 72.5−0.5 | 73.0 |
| Seat tube angle° | 73.0 | 73.5+0.5 | 73.5+0.5 | 74.0+1.0 |
| Chainstaymm | 408 | 408 | 410+2 | 410+2 |
| Wheelbasemm | 998 | 980−18 | 994−4 | 978−20 |
| BB dropmm | 70 | 68−2 | 67−3 | 72+2 |
| BB heightmm | — | — | — | 268 |
| Standovermm | — | — | — | 768 |
| Part | SLR M | Orca Aero 53 | Teammachine R 56 | Tarmac SL8 54 |
|---|---|---|---|---|
| Stem | 100 mm | 90 mm | 100 mm | 100 mm |
| Bar | 420 mm | 400 mm | 420 mm | 420 mm |
| Crank | 172.5 mm | 170 mm | 172.5 mm | 172.5 mm |
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