2022 Specialized Aethos FACT 12r Carbon vs 2024 Specialized Tarmac SL8
The 61 is the Specialized Tarmac SL8 size closest to your 61 Specialized Aethos FACT 12r Carbon. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the Specialized Tarmac SL8
Compared with the Specialized Aethos FACT 12r Carbon in 61, the Specialized Tarmac SL8 in 61 places the top of the head tube at about the same height and about as far forward, relative to the bottom bracket.
- Frame stack
- ±0 mm
- About the same height
- Frame reach
- ±0 mm
- About the same reach
- Wheelbase
- +1 mm
- About the same
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Aethos FACT 12r Carbon, 61Specialized Tarmac SL8, 61Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Aethos FACT 12r Carbon 61 | Specialized Tarmac SL8 61 | Difference |
|---|---|---|---|
| Reach | 408mm | 408 | ±0 mm |
| Stack | 612mm | 612 | ±0 mm |
| Head tube angle | 74° | 74 | ±0.0° |
| Seat tube angle | 73° | 73 | ±0.0° |
| Chainstay length | 410mm | 410 | ±0 mm |
| Wheelbase | 1012mm | 1013 | +1 mm |
| BB drop | 72mm | 72 | ±0 mm |
| BB height | 268mm | 268 | ±0 mm |
| Standover | 824mm | 834 | +10 mm |
| Seat tube length | 567mm | 545 | −22 mm |
| Fork length | 369mm | 370 | +1 mm |
| Head tube length | 204mm | 204 | ±0 mm |
Differences are the Specialized Tarmac SL8 minus the Specialized Aethos FACT 12r Carbon. Full charts: 2022 Specialized Aethos FACT 12r Carbon, 2024 Specialized Tarmac SL8.
Where each sits in its class
Specialized Aethos FACT 12r CarbonSpecialized Tarmac SL8
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 FACT 12r CarbonS-Works FACT 12r Carbon | Specialized Tarmac SL8 |
|---|---|---|
| Frame | Specialized S-Works Aethos FACT | not listed |
| Seatpost | Roval Alpinist | not listed |
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