2021 Specialized Aethos Founder's Edition vs 2020 Specialized Tarmac SL6
The 56 is the Specialized Tarmac SL6 size closest to your 56 Specialized Aethos Founder's Edition. 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 Tarmac SL6
Compared with the Specialized Aethos Founder's Edition in 56, the Specialized Tarmac SL6 in 56 places the top of the head tube at about the same height and about as far forward, relative to the bottom bracket.
- Frame stack
- ±0 mm
- About the same height
- Frame reach
- ±0 mm
- About the same reach
- Wheelbase
- −1 mm
- About the same
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
Specialized Aethos Founder's Edition, 56Specialized Tarmac SL6, 56Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Aethos Founder's Edition 56 | Specialized Tarmac SL6 56 | Difference |
|---|---|---|---|
| Reach | 395mm | 395mm | ±0 mm |
| Stack | 565mm | 565mm | ±0 mm |
| Head tube angle | 73.5° | 73.5° | ±0.0° |
| Seat tube angle | 73.5° | 73.5° | ±0.0° |
| Chainstay length | 410mm | 410mm | ±0 mm |
| Wheelbase | 991mm | 990mm | −1 mm |
| BB drop | 72mm | 72mm | ±0 mm |
| BB height | 268mm | 268mm | ±0 mm |
| Standover | 769mm | 795mm | +26 mm |
| Seat tube length | 504mm | 501mm | −3 mm |
| Fork length | 369mm | 363mm | −6 mm |
| Head tube length | 157mm | 163mm | +6 mm |
Differences are the Specialized Tarmac SL6 minus the Specialized Aethos Founder's Edition. Full charts: 2021 Specialized Aethos Founder's Edition, 2020 Specialized Tarmac SL6.
Where each sits in its class
Specialized Aethos Founder's EditionSpecialized Tarmac SL6
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 Founder's EditionS-Works Founder's Edition | Specialized Tarmac SL6S-Works |
|---|---|---|
| Frame | Specialized S-Works Aethos FACT | not listed |
| Shifter | SRAM Red eTap AXS | not listed |
| Derailleur | SRAM RED eTAP AXS | SRAM RED eTAP AXS |
| Cassette | SRAM Red eTap | SRAM RED XG-1290 |
| Chain | SRAM Red | SRAM Red |
| Crankset | SRAM RED AXS Power Meter | SRAM RED AXS Power Meter |
| Bottom bracket | CeramicSpeed SRAM DUB | SRAM DUB |
| Wheelset | Roval Alpinist CLX | Roval CLX 50 |
| Tire | Specialized Turbo Cotton | Specialized Turbo Cotton |
| Brake | Shimano 105 | SRAM Red eTap AXS |
| Handlebar | Roval Alpinist Cockpit | not listed |
| Seatpost | Roval Alpinist | not listed |
| Saddle | Specialized S-Works Romin Evo | Specialized S-Works Power |
| Hub | not listed | Specialized LuHai_RVT66L-K5-B25-AN2-N4-F0 |
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