2023 Specialized Aethos LTD vs 2025 Trek Émonda ALR
The Trek Émonda ALR size closest to your 54 is the 54. Compare the 54 instead
What changes on the Trek Émonda ALR
Compared with the Specialized Aethos LTD in 54, the Trek Émonda ALR in 52 places the top of the head tube 11 mm lower and about as far forward, relative to the bottom bracket.
- Frame stack
- −11 mm
- Lower front end
- Frame reach
- −1 mm
- About the same reach
- Wheelbase
- −1 mm
- About the same
- Head angle
- −0.2°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
Only the Specialized Aethos LTD is drawn. The Trek Émonda ALR numbers we have for size 52 are missing the seat angle.
Geometry side by side
| Measurement | Specialized Aethos LTD 54 | Trek Émonda ALR 52 | Difference |
|---|---|---|---|
| Reach | 384mm | 383 | −1 mm |
| Stack | 544mm | 533 | −11 mm |
| Head tube angle | 73° | 72.8° | −0.2° |
| Seat tube angle | 74° | not listed | |
| Chainstay length | 410mm | 410 | ±0 mm |
| Wheelbase | 978mm | 977 | −1 mm |
| BB drop | 72mm | 72 | ±0 mm |
| BB height | 268mm | not listed | |
| Standover | 748mm | 732 | −16 mm |
| Seat tube length | 481mm | 483 | +2 mm |
| Fork length | 369mm | not listed | |
| Head tube length | 137mm | 121 | −16 mm |
| Effective top tube | not listed | 534 |
Differences are the Trek Émonda ALR minus the Specialized Aethos LTD. Full charts: 2023 Specialized Aethos LTD, 2025 Trek Émonda ALR.
Where each sits in its class
Specialized Aethos LTDTrek Émonda ALR
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 LTDS-Works LTD | Trek Émonda ALRALR 5 |
|---|---|---|
| Frame | Specialized S-Works Aethos FACT | not listed |
| Shifter | Campagnolo Super Record | not listed |
| Derailleur | Campagnolo Super Record | not listed |
| Cassette | Campagnolo Super Record | not listed |
| Chain | Campagnolo Super Record | not listed |
| Crankset | Campagnolo Super Record | not listed |
| Wheelset | Campagnolo Hyperon Ultra | Bontrager Paradigm SL |
| Tire | Specialized S-Works Turbo 2BR | Bontrager R1 Hard-Case Lite |
| Brake | Campagnolo Super Record | not listed |
| Seatpost | Roval Alpinist | not listed |
| Saddle | Specialized S-Works Power | not listed |
| Fork | not listed | Trek Émonda ALR |
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