2021 Trek Émonda SL Disc Frameset vs 2023 Specialized Aethos Expert
The Specialized Aethos Expert size closest to your 54 is the 54. Compare the 54 instead
What changes on the Specialized Aethos Expert
Compared with the Trek Émonda SL Disc Frameset in 54, the Specialized Aethos Expert in 49 places the top of the head tube 27 mm lower and 11 mm further back, relative to the bottom bracket. Its wheelbase is 8 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −27 mm
- Lower front end
- Frame reach
- −11 mm
- Shorter frame reach
- Wheelbase
- −8 mm
- Shorter: quicker to change direction
- Head angle
- −1.3°
- Slacker: calmer steering
- Chainstays
- ±0 mm
- About the same
The two frames
We can't draw these frames yet. The Trek Émonda SL Disc Frameset numbers we have for size 54 are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Émonda SL Disc Frameset 54 | Specialized Aethos Expert 49 | Difference |
|---|---|---|---|
| Reach | 386 | 375mm | −11 mm |
| Stack | 541 | 514mm | −27 mm |
| Head tube angle | 73.0° | 71.75° | −1.3° |
| Effective top tube | 543 | not listed | |
| Chainstay length | 410 | 410mm | ±0 mm |
| Wheelbase | 981 | 973mm | −8 mm |
| BB drop | 70 | 74mm | +4 mm |
| Standover | 744 | 705mm | −39 mm |
| Seat tube length | 496 | 431mm | −65 mm |
| Head tube length | 131 | 109mm | −22 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 Disc Frameset. Full charts: 2021 Trek Émonda SL Disc Frameset, 2023 Specialized Aethos Expert.
Where each sits in its class
Trek Émonda SL Disc FramesetSpecialized 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 SL Disc FramesetSL Disc Frameset | Specialized Aethos ExpertExpert |
|---|---|---|
| Frame | Trek Ultralight 500 | Specialized Aethos FACT |
| Fork | Trek Émonda SL | not listed |
| Derailleur | Trek derailleurs must have | SRAM Rival eTAP AXS |
| Shifter | not listed | SRAM Rival eTAP AXS |
| Cassette | not listed | SRAM Rival |
| Chain | not listed | SRAM Rival |
| Crankset | not listed | SRAM Rival AXS Power Meter |
| Bottom bracket | not listed | SRAM DUB |
| Wheelset | not listed | Roval C38 |
| Tire | not listed | Specialized S-Works Turbo |
| Brake | not listed | SRAM Rival eTap AXS |
| Seatpost | not listed | Roval Alpinist |
| Saddle | not listed | Specialized Power Expert |
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