2025 Specialized Aethos LTD 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 LTD 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 LTD, 54Trek Madone SLR, 58Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Specialized Aethos LTD 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 LTD. Full charts: 2025 Specialized Aethos LTD, 2023 Trek Madone SLR.
Where each sits in its class
Specialized Aethos LTDTrek 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 LTDS-Works LTD | Trek Madone SLRSLR 6 |
|---|---|---|
| Frame | Specialized S-Works Aethos FACT | Trek Madone |
| Shifter | SRAM RED AXS | Shimano Ultegra |
| Derailleur | SRAM Red AXS | Shimano Ultegra |
| Cassette | SRAM RED XG-1290 | Shimano Ultegra |
| Chain | SRAM RED | Shimano 105 DI2 |
| Crankset | SRAM RED AXS Power Meter | Shimano Ultegra Mid Compact |
| Bottom bracket | SRAM DUB | Trek T47 |
| Wheelset | Roval Alpinist CLX | Bontrager Aeolus Pro 51 |
| Tire | Specialized S-Works Turbo 2BR | Bontrager R3 Hard-Case Lite |
| Brake | SRAM Red AXS | Shimano Ultegra |
| Stem | Roval Alpinist | Trek Madone aero |
| 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 |
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