2024 Trek Émonda ALR Disc Frameset vs 2025 Specialized Aethos Pro
The 61 is the Specialized Aethos Pro size closest to your 62 Trek Émonda ALR Disc Frameset. 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 Aethos Pro
Compared with the Trek Émonda ALR Disc Frameset in 62, the Specialized Aethos Pro in 61 places the top of the head tube 8 mm lower and 5 mm further forward, relative to the bottom bracket.
- Frame stack
- −8 mm
- Lower front end
- Frame reach
- +5 mm
- Longer frame reach
- Wheelbase
- +2 mm
- About the same
- Head angle
- +0.1°
- About the same head angle
- Chainstays
- −2 mm
- About the same
The two frames
We can't draw these frames yet. The Trek Émonda ALR Disc Frameset numbers we have for size 62 are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Émonda ALR Disc Frameset 62 | Specialized Aethos Pro 61 | Difference |
|---|---|---|---|
| Reach | 403 | 408mm | +5 mm |
| Stack | 620 | 612mm | −8 mm |
| Head tube angle | 73.9° | 74° | +0.1° |
| Effective top tube | 598 | 595mm | −3 mm |
| Chainstay length | 412 | 410mm | −2 mm |
| Wheelbase | 1010 | 1012mm | +2 mm |
| BB drop | 68 | 72mm | +4 mm |
| Standover | 829 | 824mm | −5 mm |
| Seat tube length | 593 | 567mm | −26 mm |
| Head tube length | 211 | 204mm | −7 mm |
| Seat tube angle | not listed | 73° | |
| BB height | not listed | 268mm | |
| Fork length | not listed | 369mm |
Differences are the Specialized Aethos Pro minus the Trek Émonda ALR Disc Frameset. Full charts: 2024 Trek Émonda ALR Disc Frameset, 2025 Specialized Aethos Pro.
Where each sits in its class
Trek Émonda ALR Disc FramesetSpecialized Aethos Pro
Each bike is ranked against the other road bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
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