2022 Specialized Aethos Expert vs 2024 Specialized Tarmac SL8
The Specialized Tarmac SL8 size closest to your 54 is the 54. Compare the 54 instead
What changes on the Specialized Tarmac SL8
Compared with the Specialized Aethos Expert in 54, the Specialized Tarmac SL8 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 Expert, 54Specialized Tarmac SL8, 49Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Aethos Expert 54 | Specialized Tarmac SL8 49 | Difference |
|---|---|---|---|
| Reach | 384mm | 375 | −9 mm |
| Stack | 544mm | 514 | −30 mm |
| Head tube angle | 73° | 71.75 | −1.3° |
| Seat tube angle | 74° | 75.5 | +1.5° |
| Chainstay length | 410mm | 410 | ±0 mm |
| Wheelbase | 978mm | 973 | −5 mm |
| BB drop | 72mm | 74 | +2 mm |
| BB height | 268mm | 266 | −2 mm |
| Standover | 748mm | 735 | −13 mm |
| Seat tube length | 481mm | 445 | −36 mm |
| Fork length | 369mm | 370 | +1 mm |
| Head tube length | 137mm | 109 | −28 mm |
Differences are the Specialized Tarmac SL8 minus the Specialized Aethos Expert. Full charts: 2022 Specialized Aethos Expert, 2024 Specialized Tarmac SL8.
Where each sits in its class
Specialized Aethos ExpertSpecialized 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 ExpertExpert | Specialized Tarmac SL8 |
|---|---|---|
| Frame | Specialized Aethos FACT | not listed |
| Shifter | Specialized Di2 Shimano Ultegra R8170 | not listed |
| Derailleur | Specialized Di2 Shimano Ultegra R8150 | not listed |
| Cassette | Shimano Ultegra | not listed |
| Chain | Shimano XT M8100 | not listed |
| Crankset | Shimano Ultegra R8100 | not listed |
| Wheelset | Roval C38 | not listed |
| Tire | Specialized S-Works Turbo | not listed |
| Brake | Shimano Ultegra R8170 | not listed |
| Seatpost | Roval Alpinist | not listed |
| Saddle | Specialized Power Expert | not listed |
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