2024 Specialized Aethos 2 Pro vs 2026 Specialized Tarmac SL8 Pro Shimano
We can't match sizes for these two: one of them has no stack and reach for the sizes shown.
What changes on the Specialized Tarmac SL8 Pro Shimano
- Frame stack
- n/a
- One of the bikes has no number for this
- Frame reach
- n/a
- One of the bikes has no number for this
- Wheelbase
- n/a
- One of the bikes has no number for this
- Head angle
- n/a
- One of the bikes has no number for this
- Chainstays
- ±0 mm
- About the same
The two frames
We can't draw these frames yet. The Specialized Aethos 2 Pro numbers we have for size 61 are missing the reach, stack, seat angle and wheelbase. The numbers below still compare.
Geometry side by side
| Measurement | Specialized Aethos 2 Pro 61 | Specialized Tarmac SL8 Pro Shimano 49 | Difference |
|---|---|---|---|
| Head tube angle | 73.5 | not listed | |
| Chainstay length | 410 | 410 | ±0 mm |
| Reach | not listed | 375 | |
| Stack | not listed | 514 | |
| Seat tube angle | not listed | 75.5 | |
| Wheelbase | not listed | 973 | |
| Head tube length | not listed | 109 |
Differences are the Specialized Tarmac SL8 Pro Shimano minus the Specialized Aethos 2 Pro. Full charts: 2024 Specialized Aethos 2 Pro, 2026 Specialized Tarmac SL8 Pro Shimano.
Where each sits in its class
Specialized Aethos 2 ProSpecialized Tarmac SL8 Pro Shimano
Each bike is ranked against the other road bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Specialized Aethos 2 ProPro | Specialized Tarmac SL8 Pro ShimanoPro - Shimano Ultegra Di2 |
|---|---|---|
| Frame | Specialized Aethos 2 FACT 10r Carbon | Specialized Tarmac SL8 |
| Shifter | Shimano Ultegra R8100 Di2 | Shimano Ultegra R8170 |
| Derailleur | Shimano Ultegra R8100 Di2 | Shimano Ultegra R8150 Di2 |
| Cassette | SRAM Force | Shimano Ultegra |
| Chain | SRAM Force | Shimano XT M8100 |
| Crankset | SRAM Force E1 | Shimano Ultegra R81000 |
| Chainring | Shimano Ultegra | not listed |
| Bottom bracket | SRAM DUB BSA 68 | Shimano Threaded BSA |
| Wheelset | Roval Alpinist CL II | Roval Rapide CL III |
| Tire | S Works Turbo TLR Race | Specialized S-Works Turbo |
| Brake | Shimano Ultegra | Shimano Ultegra R8170 |
| Rotor | SRAM Force E1 | Shimano Ultegra R8170 |
| Handlebar | Roval Alpinist Cockpit II | Roval Rapide Cockpit |
| Grips | Supacaz Super Sticky Kush | not listed |
| Bar tape | Supacaz Super Sticky Kush | Supacaz Super Sticky Kush |
| Seatpost | Roval Alpinist Carbon S-Works | Specialized S-Works Tarmac SL8 |
| Saddle | Specialized Power Pro Mirror | Specialized Power Pro |
| Fork | not listed | Specialized FACT 10r |
| Stem | not listed | Roval Rapide Cockpit |
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