2021 Trek Émonda SLR vs 2023 Specialized Aethos Expert
The 52 is the Specialized Aethos Expert size closest to your 50 Trek Émonda SLR. 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 SLR in 50, the Specialized Aethos Expert in 52 places the top of the head tube 6 mm higher and about as far forward, relative to the bottom bracket.
- Frame stack
- +6 mm
- Higher front end
- Frame reach
- +2 mm
- About the same reach
- Wheelbase
- +1 mm
- About the same
- Head angle
- +0.4°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
We can't draw these frames yet. The Trek Émonda SLR numbers we have for size 50 are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Émonda SLR 50 | Specialized Aethos Expert 52 | Difference |
|---|---|---|---|
| Reach | 378 | 380mm | +2 mm |
| Stack | 521 | 527mm | +6 mm |
| Head tube angle | 72.1° | 72.5° | +0.4° |
| Effective top tube | 521 | not listed | |
| Chainstay length | 410 | 410mm | ±0 mm |
| Wheelbase | 974 | 975mm | +1 mm |
| BB drop | 72 | 74mm | +2 mm |
| Standover | 711 | 728mm | +17 mm |
| Seat tube length | 453 | 462mm | +9 mm |
| Head tube length | 111 | 120mm | +9 mm |
| Seat tube angle | not listed | 74° | |
| BB height | not listed | 266mm | |
| Fork length | not listed | 369mm |
Differences are the Specialized Aethos Expert minus the Trek Émonda SLR. Full charts: 2021 Trek Émonda SLR, 2023 Specialized Aethos Expert.
Where each sits in its class
Trek Émonda SLRSpecialized 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 SLRSLR 6 | Specialized Aethos ExpertExpert |
|---|---|---|
| Frame | Trek Ultralight 800 | Specialized Aethos FACT |
| Fork | Trek Emonda SLR | not listed |
| Shifter | Shimano Ultegra R8020 | SRAM Rival eTAP AXS |
| Derailleur | Shimano Ultegra R8000 | 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 R3 Hard-Case Lite | Specialized S-Works Turbo |
| Brake | Shimano Ultegra | SRAM Rival eTap AXS |
| Handlebar | Bontrager Aeolus RSL | not listed |
| Seatpost | Bontrager Seatmast Cap | Roval Alpinist |
| Saddle | Bontrager Aeolus Elite | Specialized Power Expert |
| Bottom bracket | not listed | SRAM DUB |
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