2023 Specialized Aethos Shimano vs 2022 Specialized Tarmac SL6
The Specialized Tarmac SL6 size closest to your 54 is the 54. Compare the 54 instead
What changes on the Specialized Tarmac SL6
Compared with the Specialized Aethos Shimano in 54, the Specialized Tarmac SL6 in 49 places the top of the head tube 30 mm lower and 9 mm further back, relative to the bottom bracket. Its wheelbase is 5 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −30 mm
- Lower front end
- Frame reach
- −9 mm
- Shorter frame reach
- Wheelbase
- −5 mm
- Shorter: quicker to change direction
- Head angle
- −1.3°
- Slacker: calmer steering
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Aethos Shimano, 54Specialized Tarmac SL6, 49Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Aethos Shimano 54 | Specialized Tarmac SL6 49 | Difference |
|---|---|---|---|
| Reach | 384mm | 375mm | −9 mm |
| Stack | 544mm | 514mm | −30 mm |
| Head tube angle | 73° | 71.75° | −1.3° |
| Seat tube angle | 74° | 75.5° | +1.5° |
| Chainstay length | 410mm | 410mm | ±0 mm |
| Wheelbase | 978mm | 973mm | −5 mm |
| BB drop | 72mm | 74mm | +2 mm |
| BB height | 268mm | 266mm | −2 mm |
| Standover | 748mm | 740mm | −8 mm |
| Seat tube length | 481mm | 451mm | −30 mm |
| Fork length | 369mm | 363mm | −6 mm |
| Head tube length | 137mm | 115mm | −22 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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