2021
2021 Specialized Aethos Founder's Edition
The 2021 Specialized Aethos Founder's Edition sits more aggressive than most road bikes. Reach 375 to 408 mm, stack 514 to 612 mm. The Aethos S-Works Founder's Edition build comes with SRAM RED eTAP AXS shifting and Roval Alpinist CLX wheels.
Source: specialized.com. Checked .
Key facts
- Brand
- Specialized
- Model
- Aethos
- Model year
- 2021
- Frame
- Founder's Edition
- Type
- Road
- Geometry labels
- 49, 52, 54, 56, 58, and 61
- Drivetrain
- SRAM RED eTAP AXS
- Wheels
- Roval Alpinist CLX
- Geometry
- Complete for every size
- Source
- specialized.com
- Checked
Geometry by size
| Measurement | 49 | 52 | 54 | 56 | 58 | 61 |
|---|---|---|---|---|---|---|
| Reach(mm) | 375 | 380 | 384 | 395 | 402 | 408 |
| Stack(mm) | 514 | 527 | 544 | 565 | 591 | 612 |
| Head tube angle(°) | 71.75 | 72.5 | 73 | 73.5 | 73.5 | 74 |
| Seat tube angle(°) | 75.5 | 74 | 74 | 73.5 | 73.5 | 73 |
| Chainstay length(mm) | 410 | 410 | 410 | 410 | 410 | 410 |
| Wheelbase(mm) | 973 | 975 | 978 | 991 | 1005 | 1012 |
| BB drop(mm) | 74 | 74 | 72 | 72 | 72 | 72 |
| BB height(mm) | 266 | 266 | 268 | 268 | 268 | 268 |
| Standover(mm) | 705 | 728 | 748 | 769 | 796 | 824 |
| Seat tube length(mm) | 431 | 462 | 481 | 504 | 532 | 567 |
| Fork length(mm) | 369 | 369 | 369 | 369 | 369 | 369 |
| Head tube length(mm) | 109 | 120 | 137 | 157 | 184 | 204 |
Stock build
13 parts
Frame
Drivetrain
Wheels & Tires
Brakes
Cockpit
Seatpost & Saddle
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Quick answers
- Which size or configuration labels have geometry for the 2021 Specialized Aethos Founder's Edition?
- Geometry is listed for 49, 52, 54, 56, 58, and 61.
- What are the reach and stack of the 2021 Specialized Aethos Founder's Edition in size 56?
- In size 56, reach is 395 mm and stack is 565 mm.
- What is the head tube angle of the 2021 Specialized Aethos Founder's Edition?
- The head tube angle is 73.5 degrees in size 56.
- What does the 2021 Specialized Aethos S-Works Founder's Edition ship with?
- The stock build includes Specialized S-Works Aethos FACT, SRAM Red eTap AXS, Roval Alpinist CLX, and Shimano 105.
- Which years of the Specialized Aethos are on Quiver?
- Quiver has the Specialized Aethos for 2021, 2025, 2024, 2023, and 2022.
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