BMC Teammachine SLR
Racers who want BMC's classic race fit. Roadmachine if you need stack.
BMC's lightweight race bike: steep, precise, and a WorldTour stack/reach reference. Less aero than Teammachine R / Timemachine.
Racers who want BMC's classic race fit. Roadmachine if you need stack.
BMC's lightweight race bike: steep, precise, and a WorldTour stack/reach reference. Less aero than Teammachine R / Timemachine.
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 | AlchemyAtlas 2017 | AlchemyAtlas 2016 |  |  SpecializedTarmac SL8 2026 |
|---|---|---|---|---|
| Stackmm | 566 | 566 | 570+4 | 544−22 |
| Reachmm | 392 | 392 | 390−2 | 384−8 |
| Head tube angle° | 73.2 | 73.2 | 72.5−0.7 | 73.0−0.2 |
| Seat tube angle° | 73.5 | 73.5 | 73.5 | 74.0+0.5 |
| Chainstaymm | 408 | 408 | 410+2 | 410+2 |
| Wheelbasemm | 996 | 996 | 996 | 978−18 |
| BB dropmm | 70 | 70 | 69−1 | 72+2 |
| BB heightmm | — | — | — | 268 |
| Standovermm | — | — | — | 768 |
| Part | Atlas 56 | Atlas 56 | Teammachine SLR 56 | Tarmac SL8 54 |
|---|---|---|---|---|
| Stem | 100 mm | 100 mm | 100 mm | 100 mm |
| Bar | 420 mm | 420 mm | 420 mm | 420 mm |
| Crank | 172.5 mm | 172.5 mm | 172.5 mm | 172.5 mm |
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