2025 Specialized Aethos Shimano vs 2023 Trek Madone SLR
The Trek Madone SLR size closest to your 54 is the 54. Compare the 54 instead
What changes on the Trek Madone SLR
Compared with the Specialized Aethos Shimano in 54, the Trek Madone SLR in 58 places the top of the head tube 37 mm higher and 12 mm further forward, relative to the bottom bracket. Its wheelbase is 14 mm longer, which can contribute to stability at speed.
- Frame stack
- +37 mm
- Higher front end
- Frame reach
- +12 mm
- Longer frame reach
- Wheelbase
- +14 mm
- Longer: steadier at speed
- Head angle
- +0.8°
- Steeper: sharper steering
- Chainstays
- +1 mm
- About the same
The two frames
Specialized Aethos Shimano, 54Trek Madone SLR, 58Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Aethos Shimano 54 | Trek Madone SLR 58 | Difference |
|---|---|---|---|
| Reach | 384mm | 396 | +12 mm |
| Stack | 544mm | 581 | +37 mm |
| Head tube angle | 73° | 73.8 | +0.8° |
| Seat tube angle | 74° | 73.0 | −1.0° |
| Effective top tube | 540mm | 574 | +34 mm |
| Chainstay length | 410mm | 411 | +1 mm |
| Wheelbase | 978mm | 992 | +14 mm |
| BB drop | 72mm | 68 | −4 mm |
| BB height | 268mm | not listed | |
| Standover | 748mm | 793 | +45 mm |
| Seat tube length | 481mm | 553 | +72 mm |
| Fork length | 369mm | not listed | |
| Head tube length | 137mm | 171 | +34 mm |
Differences are the Trek Madone SLR minus the Specialized Aethos Shimano. Full charts: 2025 Specialized Aethos Shimano, 2023 Trek Madone SLR.
Where each sits in its class
Specialized Aethos ShimanoTrek Madone SLR
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 ShimanoS-Works - Shimano Dura-Ace Di2 | Trek Madone SLRSLR 6 |
|---|---|---|
| Frame | Specialized Aethos | Trek Madone |
| Shifter | Shimano Dura-Ace R9270 | Shimano Ultegra |
| Derailleur | Shimano Dura-Ace R9250 | Shimano Ultegra |
| Cassette | Shimano Dura-Ace | Shimano Ultegra |
| Chain | Shimano XTR M9100 | Shimano 105 DI2 |
| Crankset | Shimano Dura-Ace R9200 | Shimano Ultegra Mid Compact |
| Bottom bracket | Shimano Dura-Ace | Trek T47 |
| Wheelset | Roval Alpinist | Bontrager Aeolus Pro 51 |
| Tire | Specialized S-Works Turbo 2BR | Bontrager R3 Hard-Case Lite |
| Brake | Shimano Dura-Ace R9200 | Shimano Ultegra |
| Seatpost | Roval Alpinist | Trek Madone |
| Saddle | Specialized S-Works Power | Bontrager Aeolus Elite |
| Fork | not listed | Trek Madone KVF |
| Chainring | not listed | Shimano Ultegra |
| Rotor | not listed | Shimano Ultegra |
| Handlebar | not listed | Trek Madone Integrated |
| Stem | not listed | Trek Madone aero |
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