2020 Specialized Tarmac SL6 Disc vs 2022 Specialized Aethos Expert
The 49 is the Specialized Aethos Expert size closest to your 44 Specialized Tarmac SL6 Disc. 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 Disc in 44, the Specialized Aethos Expert in 49 places the top of the head tube 14 mm higher and 10 mm further forward, relative to the bottom bracket. Its wheelbase is 4 mm longer, which can contribute to stability at speed.
- Frame stack
- +14 mm
- Higher front end
- Frame reach
- +10 mm
- Longer frame reach
- Wheelbase
- +4 mm
- Longer: steadier at speed
- Head angle
- +1.3°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Tarmac SL6 Disc, 44Specialized Aethos Expert, 49Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Tarmac SL6 Disc 44 | Specialized Aethos Expert 49 | Difference |
|---|---|---|---|
| Reach | 365mm | 375mm | +10 mm |
| Stack | 500mm | 514mm | +14 mm |
| Head tube angle | 70.5° | 71.75° | +1.3° |
| Seat tube angle | 76° | 75.5° | −0.5° |
| Chainstay length | 410mm | 410mm | ±0 mm |
| Wheelbase | 969mm | 973mm | +4 mm |
| BB drop | 74mm | 74mm | ±0 mm |
| BB height | 266mm | 266mm | ±0 mm |
| Standover | 730mm | 705mm | −25 mm |
| Seat tube length | 400mm | 431mm | +31 mm |
| Fork length | 363mm | 369mm | +6 mm |
| Head tube length | 105mm | 109mm | +4 mm |
Differences are the Specialized Aethos Expert minus the Specialized Tarmac SL6 Disc. Full charts: 2020 Specialized Tarmac SL6 Disc, 2022 Specialized Aethos Expert.
Where each sits in its class
Specialized Tarmac SL6 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 SL6 DiscDisc | Specialized Aethos ExpertExpert |
|---|---|---|
| Frame | Specialized Tarmac SL6 | Specialized Aethos FACT |
| Shifter | Shimano Tiagra | Specialized Di2 Shimano Ultegra R8170 |
| Derailleur | Shimano Tiagra | Specialized Di2 Shimano Ultegra R8150 |
| Chain | KMC X10 | Shimano XT M8100 |
| Crankset | Shimano Tiagra 4700 | Shimano Ultegra R8100 |
| Wheelset | Specialized Axis Sport | Roval C38 |
| Tire | Specialized Turbo Pro | Specialized S-Works Turbo |
| Saddle | Specialized Power Sport | Specialized Power Expert |
| Cassette | not listed | Shimano Ultegra |
| Brake | not listed | Shimano Ultegra R8170 |
| Seatpost | not listed | Roval Alpinist |
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