2021 Specialized Aethos Pro vs 2023 Trek Émonda SLR Disc Frameset
The 50 is the Trek Émonda SLR Disc Frameset size closest to your 52 Specialized Aethos Pro. 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 Pro in 52, the Trek Émonda SLR Disc Frameset in 50 places the top of the head tube 6 mm lower and about as far forward, relative to the bottom bracket.
- Frame stack
- −6 mm
- Lower front end
- Frame reach
- −2 mm
- About the same reach
- Wheelbase
- −1 mm
- About the same
- Head angle
- −0.4°
- Slacker: calmer steering
- Chainstays
- ±0 mm
- About the same
The two frames
Only the Specialized Aethos Pro is drawn. The Trek Émonda SLR Disc Frameset numbers we have for size 50 are missing the seat angle.
Geometry side by side
| Measurement | Specialized Aethos Pro 52 | Trek Émonda SLR Disc Frameset 50 | Difference |
|---|---|---|---|
| Reach | 380mm | 378 | −2 mm |
| Stack | 527mm | 521 | −6 mm |
| Head tube angle | 72.5° | 72.1° | −0.4° |
| Seat tube angle | 74° | not listed | |
| Chainstay length | 410mm | 410 | ±0 mm |
| Wheelbase | 975mm | 974 | −1 mm |
| BB drop | 74mm | 72 | −2 mm |
| BB height | 266mm | not listed | |
| Standover | 728mm | 711 | −17 mm |
| Seat tube length | 462mm | 453 | −9 mm |
| Fork length | 369mm | not listed | |
| Head tube length | 120mm | 111 | −9 mm |
| Effective top tube | not listed | 521 |
Differences are the Trek Émonda SLR Disc Frameset minus the Specialized Aethos Pro. Full charts: 2021 Specialized Aethos Pro, 2023 Trek Émonda SLR Disc Frameset.
Where each sits in its class
Specialized Aethos ProTrek 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 ProPro | Trek Émonda SLR Disc FramesetSLR Disc Frameset |
|---|---|---|
| Frame | Specialized Aethos FACT | Trek Ultralight 800 |
| Derailleur | SRAM Force eTAP AXS | Trek derailleurs must have |
| Cassette | SRAM XG-1270 | not listed |
| Chain | SRAM Force | not listed |
| Crankset | SRAM FC Force DUB | not listed |
| Bottom bracket | SRAM DUB | not listed |
| Wheelset | Roval Alpinist CL | not listed |
| Tire | Specialized S-Works Turbo | not listed |
| Brake | SRAM Force eTAP | not listed |
| Seatpost | Roval Alpinist | not listed |
| Saddle | Specialized Power | not listed |
| Fork | not listed | Trek Emonda SLR |
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