2025 Specialized Aethos FACT 10r Carbon vs 2025 Trek Émonda ALR
The 50 is the Trek Émonda ALR size closest to your 52 Specialized Aethos FACT 10r Carbon. 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 Trek Émonda ALR
Compared with the Specialized Aethos FACT 10r Carbon in 52, the Trek Émonda ALR in 50 places the top of the head tube 6 mm lower and about as far forward, relative to the bottom bracket.
- Frame stack
- −6 mm
- Lower front end
- Frame reach
- −2 mm
- About the same reach
- Wheelbase
- −1 mm
- About the same
- Head angle
- −0.4°
- Slacker: calmer steering
- Chainstays
- ±0 mm
- About the same
The two frames
Only the Specialized Aethos FACT 10r Carbon is drawn. The Trek Émonda ALR numbers we have for size 50 are missing the seat angle.
Geometry side by side
| Measurement | Specialized Aethos FACT 10r Carbon 52 | Trek Émonda ALR 50 | Difference |
|---|---|---|---|
| Reach | 380mm | 378 | −2 mm |
| Stack | 527mm | 521 | −6 mm |
| Head tube angle | 72.5° | 72.1° | −0.4° |
| Seat tube angle | 74° | not listed | |
| Effective top tube | 531 | 521 | −10 mm |
| Chainstay length | 410mm | 410 | ±0 mm |
| Wheelbase | 975mm | 974 | −1 mm |
| BB drop | 74mm | 72 | −2 mm |
| BB height | 266mm | not listed | |
| Standover | 728mm | 711 | −17 mm |
| Seat tube length | 462mm | 453 | −9 mm |
| Fork length | 369mm | not listed | |
| Head tube length | 120mm | 111 | −9 mm |
Differences are the Trek Émonda ALR minus the Specialized Aethos FACT 10r Carbon. Full charts: 2025 Specialized Aethos FACT 10r Carbon, 2025 Trek Émonda ALR.
Where each sits in its class
Specialized Aethos FACT 10r CarbonTrek 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 FACT 10r CarbonFACT 10r Carbon | Trek Émonda ALRALR 5 |
|---|---|---|
| Frame | Specialized Aethos FACT | not listed |
| Fork | Specialized FACT Carbon | Trek Émonda ALR |
| Shifter | SRAM Force eTAP AXS | not listed |
| Derailleur | SRAM Force eTAP AXS | not listed |
| Cassette | SRAM Force | not listed |
| Chain | SRAM Force | not listed |
| Crankset | SRAM Force DUB | not listed |
| Chainring | SRAM Force | not listed |
| Bottom bracket | SRAM DUB BSA 68 | not listed |
| Wheelset | Roval Alpinist CL II | Bontrager Paradigm SL |
| Tire | Specialized S-Works Turbo 2BR | Bontrager R1 Hard-Case Lite |
| Brake | SRAM Force eTAP AXS | not listed |
| Handlebar | Specialized S-Works Short & Shallow | not listed |
| Stem | Specialized Pro SL | not listed |
| Grips | Supacaz Super Sticky Kush | not listed |
| Seatpost | Roval Alpinist | not listed |
| Saddle | Specialized Body Geometry Power | not listed |
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