2021 Specialized Tarmac SL6 Sport vs 2023 Specialized Aethos Expert
The Specialized Aethos Expert size closest to your 54 is the 54. Compare the 54 instead
What changes on the Specialized Aethos Expert
Compared with the Specialized Tarmac SL6 Sport in 54, the Specialized Aethos Expert 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 Tarmac SL6 Sport, 54Specialized Aethos Expert, 49Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Tarmac SL6 Sport 54 | Specialized Aethos Expert 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 | 775mm | 705mm | −70 mm |
| Seat tube length | 499mm | 431mm | −68 mm |
| Fork length | 363mm | 369mm | +6 mm |
| Head tube length | 143mm | 109mm | −34 mm |
Differences are the Specialized Aethos Expert minus the Specialized Tarmac SL6 Sport. Full charts: 2021 Specialized Tarmac SL6 Sport, 2023 Specialized Aethos Expert.
Where each sits in its class
Specialized Tarmac SL6 SportSpecialized Aethos Expert
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 Tarmac SL6 SportSport | Specialized Aethos ExpertExpert |
|---|---|---|
| Frame | Specialized Tarmac SL6 | Specialized Aethos FACT |
| Shifter | Shimano 105 R7020 | SRAM Rival eTAP AXS |
| Derailleur | Shimano 105 R7000 | SRAM Rival eTAP AXS |
| Cassette | Shimano 105 R7000 | SRAM Rival |
| Chain | KMC X11 Extra | SRAM Rival |
| Crankset | Shimano 105 R7000 | SRAM Rival AXS Power Meter |
| Wheelset | DT Swiss R470 | Roval C38 |
| Tire | Specialized Turbo Pro | Specialized S-Works Turbo |
| Brake | Shimano 105 | SRAM Rival eTap AXS |
| Saddle | Specialized Power Sport | Specialized Power Expert |
| Bottom bracket | not listed | SRAM DUB |
| Seatpost | not listed | Roval Alpinist |
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