2023 Trek Domane SLR Gen 4 vs 2025 Specialized Roubaix SL8 Pro
The Specialized Roubaix SL8 Pro size closest to your 54 is the 52. Compare the 52 instead
What changes on the Specialized Roubaix SL8 Pro
Compared with the Trek Domane SLR Gen 4 in 54, the Specialized Roubaix SL8 Pro in 58 places the top of the head tube 55 mm higher and 23 mm further forward, relative to the bottom bracket. Its wheelbase is 21 mm longer, which can contribute to stability at speed.
- Frame stack
- +55 mm
- Higher front end
- Frame reach
- +23 mm
- Longer frame reach
- Wheelbase
- +21 mm
- Longer: steadier at speed
- Head angle
- +1.7°
- Steeper: sharper steering
- Chainstays
- +3 mm
- Longer: more planted
The two frames
We can't draw these frames yet. The Trek Domane SLR Gen 4 numbers we have for size 54 are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Domane SLR Gen 4 54 | Specialized Roubaix SL8 Pro 58 | Difference |
|---|---|---|---|
| Reach | 374 | 397mm | +23 mm |
| Stack | 575 | 630mm | +55 mm |
| Head tube angle | 71.3° | 73° | +1.7° |
| Effective top tube | 542 | not listed | |
| Chainstay length | 420 | 423mm | +3 mm |
| Wheelbase | 1010 | 1031mm | +21 mm |
| BB drop | 80 | 78mm | −2 mm |
| Standover | 754 | 809mm | +55 mm |
| Seat tube length | 500 | 505mm | +5 mm |
| Head tube length | 160 | 168mm | +8 mm |
| Seat tube angle | not listed | 73.5° | |
| BB height | not listed | 271mm | |
| Fork length | not listed | 375mm |
Differences are the Specialized Roubaix SL8 Pro minus the Trek Domane SLR Gen 4. Full charts: 2023 Trek Domane SLR Gen 4, 2025 Specialized Roubaix SL8 Pro.
Where each sits in its class
Trek Domane SLR Gen 4Specialized Roubaix SL8 Pro
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 Domane SLR Gen 4 | Specialized Roubaix SL8 ProSL8 Pro |
|---|---|---|
| Fork | not listed | Specialized Future Shock 3.3 |
| Shifter | not listed | Shimano Ultegra R8170 Di2 |
| Derailleur | not listed | Shimano Ultegra R8150 Di2 |
| Cassette | not listed | Shimano Ultegra |
| Chain | not listed | Shimano XT M8100 |
| Crankset | not listed | Shimano Ultegra R8100 |
| Wheelset | not listed | Roval Terra CL II |
| Tire | not listed | Specialized S-Works Mondo 2BR |
| Brake | not listed | Shimano Ultegra |
| Stem | not listed | Specialized Future |
| Seatpost | not listed | Specialized S-Works Pave Seat post |
| Saddle | not listed | Specialized Power Pro Mirror |
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