2021 Specialized Tarmac SL6 Comp vs 2023 Specialized Aethos Expert
The 58 is the Specialized Aethos Expert size closest to your 58 Specialized Tarmac SL6 Comp. 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 Aethos Expert
Compared with the Specialized Tarmac SL6 Comp in 58, the Specialized Aethos Expert in 58 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
- ±0 mm
- About the same
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Tarmac SL6 Comp, 58Specialized Aethos Expert, 58Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Tarmac SL6 Comp 58 | Specialized Aethos Expert 58 | Difference |
|---|---|---|---|
| Reach | 402mm | 402mm | ±0 mm |
| Stack | 591mm | 591mm | ±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 | 1005mm | 1005mm | ±0 mm |
| BB drop | 72mm | 72mm | ±0 mm |
| BB height | 268mm | 268mm | ±0 mm |
| Standover | 826mm | 796mm | −30 mm |
| Seat tube length | 540mm | 532mm | −8 mm |
| Fork length | 363mm | 369mm | +6 mm |
| Head tube length | 190mm | 184mm | −6 mm |
Differences are the Specialized Aethos Expert minus the Specialized Tarmac SL6 Comp. Full charts: 2021 Specialized Tarmac SL6 Comp, 2023 Specialized Aethos Expert.
Where each sits in its class
Specialized Tarmac SL6 CompSpecialized 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 CompComp | Specialized Aethos ExpertExpert |
|---|---|---|
| Frame | Specialized Tarmac SL6 | Specialized Aethos FACT |
| Shifter | Shimano Ultegra | SRAM Rival eTAP AXS |
| Derailleur | Shimano Ultegra R8000 | SRAM Rival eTAP AXS |
| Cassette | Shimano Ultegra R8000 | SRAM Rival |
| Chain | Shimano Ultegra | SRAM Rival |
| Crankset | Shimano Ultegra R8000 | SRAM Rival AXS Power Meter |
| Wheelset | DT Swiss R470 | Roval C38 |
| Tire | Specialized Turbo Pro | Specialized S-Works Turbo |
| Brake | Shimano Ultegra | 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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