2021 Specialized Aethos Founder's Edition vs 2023 Trek Émonda SLR Disc Frameset
The 47 is the Trek Émonda SLR Disc Frameset size closest to your 49 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 Trek Émonda SLR Disc Frameset
Compared with the Specialized Aethos Founder's Edition in 49, the Trek Émonda SLR Disc Frameset in 47 places the top of the head tube 7 mm lower and about as far forward, relative to the bottom bracket.
- Frame stack
- −7 mm
- Lower front end
- Frame reach
- −2 mm
- About the same reach
- Wheelbase
- −1 mm
- About the same
- Head angle
- +0.3°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
Only the Specialized Aethos Founder's Edition is drawn. The Trek Émonda SLR Disc Frameset numbers we have for size 47 are missing the seat angle.
Geometry side by side
| Measurement | Specialized Aethos Founder's Edition 49 | Trek Émonda SLR Disc Frameset 47 | Difference |
|---|---|---|---|
| Reach | 375mm | 373 | −2 mm |
| Stack | 514mm | 507 | −7 mm |
| Head tube angle | 71.75° | 72.1° | +0.3° |
| Seat tube angle | 75.5° | not listed | |
| Chainstay length | 410mm | 410 | ±0 mm |
| Wheelbase | 973mm | 972 | −1 mm |
| BB drop | 74mm | 72 | −2 mm |
| BB height | 266mm | not listed | |
| Standover | 705mm | 692 | −13 mm |
| Seat tube length | 431mm | 424 | −7 mm |
| Fork length | 369mm | not listed | |
| Head tube length | 109mm | 100 | −9 mm |
| Effective top tube | not listed | 512 |
Differences are the Trek Émonda SLR Disc Frameset minus the Specialized Aethos Founder's Edition. Full charts: 2021 Specialized Aethos Founder's Edition, 2023 Trek Émonda SLR Disc Frameset.
Where each sits in its class
Specialized Aethos Founder's EditionTrek Émonda SLR Disc Frameset
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 | Trek Émonda SLR Disc FramesetSLR Disc Frameset |
|---|---|---|
| Frame | Specialized S-Works Aethos FACT | Trek Ultralight 800 |
| Shifter | SRAM Red eTap AXS | not listed |
| Derailleur | SRAM RED eTAP AXS | Trek derailleurs must have |
| Cassette | SRAM Red eTap | not listed |
| Chain | SRAM Red | not listed |
| Crankset | SRAM RED AXS Power Meter | not listed |
| Bottom bracket | CeramicSpeed SRAM DUB | not listed |
| Wheelset | Roval Alpinist CLX | not listed |
| Tire | Specialized Turbo Cotton | not listed |
| Brake | Shimano 105 | not listed |
| Handlebar | Roval Alpinist Cockpit | not listed |
| Seatpost | Roval Alpinist | not listed |
| Saddle | Specialized S-Works Romin Evo | not listed |
| Fork | not listed | Trek Emonda SLR |
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