2021 Specialized Tarmac SL6 vs 2023 Specialized Aethos Expert
The 61 is the Specialized Aethos Expert size closest to your 61 Specialized Tarmac SL6. 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 in 61, the Specialized Aethos Expert in 61 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, 61Specialized Aethos Expert, 61Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Tarmac SL6 61 | Specialized Aethos Expert 61 | Difference |
|---|---|---|---|
| Reach | 408mm | 408mm | ±0 mm |
| Stack | 612mm | 612mm | ±0 mm |
| Head tube angle | 74° | 74° | ±0.0° |
| Seat tube angle | 73° | 73° | ±0.0° |
| Chainstay length | 410mm | 410mm | ±0 mm |
| Wheelbase | 1012mm | 1012mm | ±0 mm |
| BB drop | 72mm | 72mm | ±0 mm |
| BB height | 268mm | 268mm | ±0 mm |
| Standover | 850mm | 824mm | −26 mm |
| Seat tube length | 570mm | 567mm | −3 mm |
| Fork length | 363mm | 369mm | +6 mm |
| Head tube length | 210mm | 204mm | −6 mm |
Differences are the Specialized Aethos Expert minus the Specialized Tarmac SL6. Full charts: 2021 Specialized Tarmac SL6, 2023 Specialized Aethos Expert.
Where each sits in its class
Specialized Tarmac SL6Specialized 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 SL6Tarmac SL6 - Shimano Tiagra | Specialized Aethos ExpertExpert |
|---|---|---|
| Frame | Specialized Tarmac SL6 | Specialized Aethos FACT |
| Shifter | Shimano Tiagra | SRAM Rival eTAP AXS |
| Derailleur | Shimano Tiagra | SRAM Rival eTAP AXS |
| Chain | KMC X10 | SRAM Rival |
| Crankset | Shimano Tiagra 4700 | SRAM Rival AXS Power Meter |
| Wheelset | Specialized Axis Sport | Roval C38 |
| Tire | Specialized Turbo Pro | Specialized S-Works Turbo |
| Saddle | Specialized Power Sport | Specialized Power Expert |
| Cassette | not listed | SRAM Rival |
| Bottom bracket | not listed | SRAM DUB |
| Brake | not listed | SRAM Rival eTap AXS |
| Seatpost | not listed | Roval Alpinist |
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