2019 Specialized Tarmac Men's Disc Sport vs 2021 Specialized Aethos
The Specialized Aethos size closest to your 54 is the 54. Compare the 54 instead
What changes on the Specialized Aethos
Compared with the Specialized Tarmac Men's Disc Sport in 54, the Specialized Aethos in 49 places the top of the head tube 30 mm lower and 9 mm further back, relative to the bottom bracket.
- Frame stack
- −30 mm
- Lower front end
- Frame reach
- −9 mm
- Shorter frame reach
- Wheelbase
- ±0 mm
- About the same
- Head angle
- −1.3°
- Slacker: calmer steering
- Chainstays
- +5 mm
- Longer: more planted
The two frames
Specialized Tarmac Men's Disc Sport, 54Specialized Aethos, 49Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Tarmac Men's Disc Sport 54 | Specialized Aethos 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° |
| Effective top tube | 544mm | not listed | |
| Chainstay length | 405mm | 410mm | +5 mm |
| Wheelbase | 973mm | 973mm | ±0 mm |
| BB drop | 72mm | 74mm | +2 mm |
| BB height | 268mm | 266mm | −2 mm |
| Standover | 775mm | 705mm | −70 mm |
| Seat tube length | 498mm | 431mm | −67 mm |
| Fork length | 363mm | 369mm | +6 mm |
| Head tube length | 143mm | 109mm | −34 mm |
Differences are the Specialized Aethos minus the Specialized Tarmac Men's Disc Sport. Full charts: 2019 Specialized Tarmac Men's Disc Sport, 2021 Specialized Aethos.
Where each sits in its class
Specialized Tarmac Men's Disc SportSpecialized Aethos
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 Men's Disc SportMen's Disc Sport | Specialized AethosAethos Frameset |
|---|---|---|
| Frame | Specialized Tarmac SL6 | Specialized Aethos FACT |
| Shifter | Shimano 105 | not listed |
| Derailleur | Shimano 105 R7000, Shimano 105 R7000 GS | not listed |
| Cassette | Shimano 105 R7000 | not listed |
| Chain | KMC X11 EL | not listed |
| Crankset | Shimano 105 R7000 | not listed |
| Wheelset | DT Swiss R470 | not listed |
| Tire | Specialized Turbo Pro | not listed |
| Brake | Shimano 105 R7070 | not listed |
| Saddle | Specialized Toupé Sport | not listed |
| Seatpost | not listed | Roval Alpinist |
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