2025 Specialized Aethos Pro Shimano vs 2024 Specialized Aethos 2 Pro
We can't match sizes for these two: one of them has no stack and reach for the sizes shown.
What changes on the Specialized Aethos 2 Pro
- Frame stack
- n/a
- One of the bikes has no number for this
- Frame reach
- n/a
- One of the bikes has no number for this
- Wheelbase
- n/a
- One of the bikes has no number for this
- Head angle
- +1.8°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Only the Specialized Aethos Pro Shimano is drawn. The Specialized Aethos 2 Pro numbers we have for size 61 are missing the reach, stack, seat angle and wheelbase.
Geometry side by side
| Measurement | Specialized Aethos Pro Shimano 49 | Specialized Aethos 2 Pro 61 | Difference |
|---|---|---|---|
| Reach | 375mm | not listed | |
| Stack | 514mm | not listed | |
| Head tube angle | 71.75° | 73.5 | +1.8° |
| Seat tube angle | 75.5° | not listed | |
| Effective top tube | 508mm | not listed | |
| Chainstay length | 410mm | 410 | ±0 mm |
| Wheelbase | 973mm | not listed | |
| BB drop | 74mm | not listed | |
| BB height | 266mm | not listed | |
| Standover | 705mm | not listed | |
| Seat tube length | 431mm | not listed | |
| Fork length | 369mm | not listed | |
| Head tube length | 109mm | not listed |
Differences are the Specialized Aethos 2 Pro minus the Specialized Aethos Pro Shimano. Full charts: 2025 Specialized Aethos Pro Shimano, 2024 Specialized Aethos 2 Pro.
Where each sits in its class
Specialized Aethos Pro ShimanoSpecialized Aethos 2 Pro
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 Pro ShimanoPro - Shimano Ultegra Di2 | Specialized Aethos 2 ProPro |
|---|---|---|
| Frame | Specialized Aethos FACT | Specialized Aethos 2 FACT 10r Carbon |
| Shifter | Shimano Ultegra R8170 Di2 | Shimano Ultegra R8100 Di2 |
| Derailleur | Shimano Ultegra R8150 Di2 | Shimano Ultegra R8100 Di2 |
| Cassette | Shimano Ultegra | SRAM Force |
| Chain | Shimano XT M8100 | SRAM Force |
| Crankset | Shimano Ultegra R8100 | SRAM Force E1 |
| Wheelset | Roval Alpinist CL II | Roval Alpinist CL II |
| Tire | Specialized S-Works Turbo 2BR | S Works Turbo TLR Race |
| Brake | Shimano Ultegra R8170 | Shimano Ultegra |
| Seatpost | Roval Alpinist | Roval Alpinist Carbon S-Works |
| Saddle | Specialized Power Pro | Specialized Power Pro Mirror |
| Chainring | not listed | Shimano Ultegra |
| Bottom bracket | not listed | SRAM DUB BSA 68 |
| Rotor | not listed | SRAM Force E1 |
| Handlebar | not listed | Roval Alpinist Cockpit II |
| Grips | not listed | Supacaz Super Sticky Kush |
| Bar tape | not listed | Supacaz Super Sticky Kush |
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