2020 Specialized Tarmac Pro Disc vs 2022 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 Pro Disc 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 Pro Disc, 54Specialized Aethos Expert, 49Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Tarmac Pro Disc 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 | 481mm | 431mm | −50 mm |
| Fork length | 363mm | 369mm | +6 mm |
| Head tube length | 143mm | 109mm | −34 mm |
Differences are the Specialized Aethos Expert minus the Specialized Tarmac Pro Disc. Full charts: 2020 Specialized Tarmac Pro Disc, 2022 Specialized Aethos Expert.
Where each sits in its class
Specialized Tarmac Pro DiscSpecialized 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 Pro DiscPro Disc | Specialized Aethos ExpertExpert |
|---|---|---|
| Frame | Specialized Tarmac SL6 | Specialized Aethos FACT |
| Derailleur | SRAM Force eTAP AXS | Specialized Di2 Shimano Ultegra R8150 |
| Cassette | SRAM XG-1270 | Shimano Ultegra |
| Chain | SRAM Force | Shimano XT M8100 |
| Crankset | SRAM Force AXS | Shimano Ultegra R8100 |
| Bottom bracket | SRAM DUB | not listed |
| Wheelset | Roval CL 50 | Roval C38 |
| Tire | Specialized S-Works Turbo | Specialized S-Works Turbo |
| Brake | SRAM Force eTAP | Shimano Ultegra R8170 |
| Saddle | Specialized Power | Specialized Power Expert |
| Shifter | not listed | Specialized Di2 Shimano Ultegra R8170 |
| Seatpost | not listed | Roval Alpinist |
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