2021 Specialized Aethos Expert vs 2019 Specialized Tarmac Men's Disc
The Specialized Tarmac Men's Disc size closest to your 54 is the 54. Compare the 54 instead
What changes on the Specialized Tarmac Men's Disc
Compared with the Specialized Aethos Expert in 54, the Specialized Tarmac Men's Disc in 58 places the top of the head tube 47 mm higher and 18 mm further forward, relative to the bottom bracket. Its wheelbase is 27 mm longer, which can contribute to stability at speed.
- Frame stack
- +47 mm
- Higher front end
- Frame reach
- +18 mm
- Longer frame reach
- Wheelbase
- +27 mm
- Longer: steadier at speed
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Aethos Expert, 54Specialized Tarmac Men's Disc, 58Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Aethos Expert 54 | Specialized Tarmac Men's Disc 58 | Difference |
|---|---|---|---|
| Reach | 384mm | 402mm | +18 mm |
| Stack | 544mm | 591mm | +47 mm |
| Head tube angle | 73° | 73.5° | +0.5° |
| Seat tube angle | 74° | 73.5° | −0.5° |
| Chainstay length | 410mm | 410mm | ±0 mm |
| Wheelbase | 978mm | 1005mm | +27 mm |
| BB drop | 72mm | 72mm | ±0 mm |
| BB height | 268mm | 268mm | ±0 mm |
| Standover | 748mm | 826mm | +78 mm |
| Seat tube length | 481mm | 522mm | +41 mm |
| Fork length | 369mm | 363mm | −6 mm |
| Head tube length | 137mm | 190mm | +53 mm |
| Effective top tube | not listed | 577mm |
Differences are the Specialized Tarmac Men's Disc minus the Specialized Aethos Expert. Full charts: 2021 Specialized Aethos Expert, 2019 Specialized Tarmac Men's Disc.
Where each sits in its class
Specialized Aethos ExpertSpecialized Tarmac Men's Disc
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 Aethos ExpertExpert | Specialized Tarmac Men's DiscMen's S-Works Disc |
|---|---|---|
| Frame | Specialized Aethos FACT | not listed |
| Shifter | Shimano Ultegra Di2 | Shimano Dura-Ace Di2 |
| Derailleur | Shimano Ultegra R8050 Di2 | Shimano Dura-Ace R9150 Di2 |
| Cassette | Shimano Ultegra R8000 | Shimano Dura-Ace R9100 |
| Chain | Shimano Ultegra | Shimano Dura-Ace |
| Crankset | Shimano Ultegra R8000 | Specialized S-Works Power |
| Pedals | Specialized PROVIDED BY | not listed |
| Wheelset | DT Swiss R470 | Roval CLX 50 |
| Tire | Specialized S-Works Turbo | Specialized Turbo Cotton |
| Brake | Shimano 105 | Shimano Dura-Ace R9170 |
| Seatpost | Roval Alpinist | not listed |
| Saddle | Specialized Power Expert | Specialized S-Works Toupe |
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