2021 Trek Émonda SL vs 2023 Specialized Aethos Expert
The 49 is the Specialized Aethos Expert size closest to your 47 Trek Émonda SL. 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 Expert
Compared with the Trek Émonda SL in 47, the Specialized Aethos Expert in 49 places the top of the head tube 7 mm higher and about as far forward, relative to the bottom bracket.
- Frame stack
- +7 mm
- Higher front end
- Frame reach
- +2 mm
- About the same reach
- Wheelbase
- +1 mm
- About the same
- Head angle
- −0.3°
- Slacker: calmer steering
- Chainstays
- ±0 mm
- About the same
The two frames
We can't draw these frames yet. The Trek Émonda SL numbers we have for size 47 are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Émonda SL 47 | Specialized Aethos Expert 49 | Difference |
|---|---|---|---|
| Reach | 373 | 375mm | +2 mm |
| Stack | 507 | 514mm | +7 mm |
| Head tube angle | 72.1° | 71.75° | −0.3° |
| Effective top tube | 512 | not listed | |
| Chainstay length | 410 | 410mm | ±0 mm |
| Wheelbase | 972 | 973mm | +1 mm |
| BB drop | 72 | 74mm | +2 mm |
| Standover | 692 | 705mm | +13 mm |
| Seat tube length | 424 | 431mm | +7 mm |
| Head tube length | 100 | 109mm | +9 mm |
| Seat tube angle | not listed | 75.5° | |
| BB height | not listed | 266mm | |
| Fork length | not listed | 369mm |
Differences are the Specialized Aethos Expert minus the Trek Émonda SL. Full charts: 2021 Trek Émonda SL, 2023 Specialized Aethos Expert.
Where each sits in its class
Trek Émonda SLSpecialized Aethos Expert
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 | Trek Émonda SLSL 7 | Specialized Aethos ExpertExpert |
|---|---|---|
| Frame | Trek Ultralight 500 | Specialized Aethos FACT |
| Fork | Trek Émonda SL | not listed |
| Shifter | Shimano Ultegra Di2 | SRAM Rival eTAP AXS |
| Derailleur | Shimano Ultegra R8050 Di2 | SRAM Rival eTAP AXS |
| Cassette | Shimano Ultegra R8000 | SRAM Rival |
| Chain | Shimano Ultegra HG701 | SRAM Rival |
| Crankset | Shimano Ultegra R8000 | SRAM Rival AXS Power Meter |
| Wheelset | Bontrager Aeolus Pro 37 | Roval C38 |
| Tire | Bontrager R2 Hard-Case Lite | Specialized S-Works Turbo |
| Brake | Shimano Ultegra | SRAM Rival eTap AXS |
| Handlebar | Bontrager Pro VR-C | not listed |
| Seatpost | Bontrager Seatmast Cap | Roval Alpinist |
| Saddle | Bontrager Aeolus | Specialized Power Expert |
| Bottom bracket | not listed | SRAM DUB |
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