2023 Specialized Aethos Shimano vs 2022 Specialized Tarmac SL6
The 56 is the Specialized Tarmac SL6 size closest to your 56 Specialized Aethos Shimano. 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 SL6
Compared with the Specialized Aethos Shimano in 56, the Specialized Tarmac SL6 in 56 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 Shimano, 56Specialized Tarmac SL6, 56Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Aethos Shimano 56 | Specialized Tarmac SL6 56 | Difference |
|---|---|---|---|
| Reach | 395mm | 395mm | ±0 mm |
| Stack | 565mm | 565mm | ±0 mm |
| Head tube angle | 73.5° | 73.5° | ±0.0° |
| Seat tube angle | 73.5° | 73.5° | ±0.0° |
| Chainstay length | 410mm | 410mm | ±0 mm |
| Wheelbase | 991mm | 990mm | −1 mm |
| BB drop | 72mm | 72mm | ±0 mm |
| BB height | 268mm | 268mm | ±0 mm |
| Standover | 769mm | 795mm | +26 mm |
| Seat tube length | 504mm | 519mm | +15 mm |
| Fork length | 369mm | 363mm | −6 mm |
| Head tube length | 157mm | 163mm | +6 mm |
Differences are the Specialized Tarmac SL6 minus the Specialized Aethos Shimano. Full charts: 2023 Specialized Aethos Shimano, 2022 Specialized Tarmac SL6.
Where each sits in its class
Specialized Aethos ShimanoSpecialized Tarmac SL6
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 ShimanoS-Works - Shimano Dura-Ace Di2 | Specialized Tarmac SL6Tarmac SL6 - Shimano Tiagra |
|---|---|---|
| Frame | Specialized S-Works Aethos FACT | Specialized Tarmac SL6 |
| Shifter | Shimano Dura-Ace R9270 | Shimano Tiagra |
| Derailleur | Shimano Dura-Ace R9250 | Shimano Tiagra |
| Cassette | Shimano Dura-Ace | not listed |
| Chain | Shimano XTR M9100 | KMC X10 |
| Crankset | Shimano Dura-Ace R9200 | Shimano Tiagra 4700 |
| Bottom bracket | Shimano Dura-Ace | not listed |
| Wheelset | Roval Alpinist CLX | Specialized Axis Sport |
| Tire | Specialized S-Works Turbo 2BR | Specialized Turbo Pro |
| Brake | Shimano Dura-Ace R9200 | Shimano Tiagra BR-4770 |
| Seatpost | Roval Alpinist | not listed |
| Saddle | Specialized S-Works Power | Specialized Power Sport |
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