2025 Trek Domane SL Gen 4 vs 2025 Specialized Roubaix SL8 Pro
The 58 is the Specialized Roubaix SL8 Pro size closest to your 60 Trek Domane SL Gen 4. 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 Specialized Roubaix SL8 Pro
Compared with the Trek Domane SL Gen 4 in 60, the Specialized Roubaix SL8 Pro in 58 places the top of the head tube at about the same height and 14 mm further forward, relative to the bottom bracket.
- Frame stack
- −2 mm
- About the same height
- Frame reach
- +14 mm
- Longer frame reach
- Wheelbase
- −1 mm
- About the same
- Head angle
- +0.9°
- Steeper: sharper steering
- Chainstays
- −2 mm
- About the same
The two frames
We can't draw these frames yet. The Trek Domane SL Gen 4 numbers we have for size 60 are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Domane SL Gen 4 60 | Specialized Roubaix SL8 Pro 58 | Difference |
|---|---|---|---|
| Reach | 383 | 397mm | +14 mm |
| Stack | 632 | 630mm | −2 mm |
| Head tube angle | 72.1° | 73° | +0.9° |
| Effective top tube | 579 | not listed | |
| Chainstay length | 425 | 423mm | −2 mm |
| Wheelbase | 1032 | 1031mm | −1 mm |
| BB drop | 75 | 78mm | +3 mm |
| Standover | 817 | 809mm | −8 mm |
| Seat tube length | 567 | 505mm | −62 mm |
| Head tube length | 220 | 168mm | −52 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 SL Gen 4. Full charts: 2025 Trek Domane SL Gen 4, 2025 Specialized Roubaix SL8 Pro.
Where each sits in its class
Trek Domane SL 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 SL Gen 4SL 5 Gen 4 | Specialized Roubaix SL8 ProSL8 Pro |
|---|---|---|
| Frame | Trek Domane SL | not listed |
| Fork | Trek Domane SL | Specialized Future Shock 3.3 |
| Shifter | Shimano 105 R7120 | Shimano Ultegra R8170 Di2 |
| Derailleur | Shimano 105 R7100 | Shimano Ultegra R8150 Di2 |
| Cassette | Shimano 105 R7101 | Shimano Ultegra |
| Chain | Shimano SLX M7100 | Shimano XT M8100 |
| Crankset | Shimano 105 R7100 | Shimano Ultegra R8100 |
| Bottom bracket | Praxis T47 | not listed |
| Wheelset | Bontrager Paradigm SL | Roval Terra CL II |
| Tire | Bontrager R3 | Specialized S-Works Mondo 2BR |
| Rim | Bontrager Paradigm SL | not listed |
| Brake | Shimano Disc 105 | Shimano Ultegra |
| Rotor | Shimano SM-RT70 | not listed |
| Handlebar | Bontrager IsoZone VR-SF | not listed |
| Stem | Trek RCS | Specialized Future |
| Bar tape | Bontrager Supertack Perf | not listed |
| Seatpost | Aero Carbon | Specialized S-Works Pave Seat post |
| Saddle | Bontrager Short Comp | Specialized Power Pro Mirror |
| Bag | Bontrager BITS | not listed |
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