Racers and fit riders who want Giant's race geometry without Propel's deep tubes.
Giant's lightweight race bike: compact sloping top tube, sharp steering, and a fit that has been a stack/reach reference for a long time. Less aero drama than Propel.
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 |  FondriestTF2 2026 |  GiantTCR Advanced 2025 |  |  SpecializedTarmac SL8 2024 |
|---|---|---|---|---|
| Stackmm | 549 | 563+14 | 565+16 | 544−5 |
| Reachmm | 389 | 393+4 | 392+3 | 384−5 |
| Head tube angle° | 73.0 | 73.0 | 72.3−0.7 | 73.0 |
| Seat tube angle° | 73.5 | 73.0−0.5 | 73.5 | 74.0+0.5 |
| Chainstaymm | 407 | 405−2 | 410+3 | 410+3 |
| Wheelbasemm | 989 | 986−3 | 1000+11 | 978−11 |
| BB dropmm | 68 | 70+2 | 69+1 | 72+4 |
| BB heightmm | — | — | — | 268 |
| Standovermm | — | — | — | 768 |
| Part | TF2 54 | TCR Advanced ML | 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 |
Specialized S-works Tarmac SL8: how does it stack up 12 months on? · +. Under 7kg ready to ride · +. Fast, decisive handling · +. Compliant enough for long rides.
For a bike with such impressive aero performance, the Specialized S-Works Tarmac SL8 climbs remarkably well. Specialized Sworks tarmac sl8 2024 Test Review WEB ...
