2027 Trek Domane SL Gen 5 vs 2025 Specialized Roubaix SL8 Pro
The 56 is the Specialized Roubaix SL8 Pro size closest to your L Trek Domane SL Gen 5. 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 5 in L, the Specialized Roubaix SL8 Pro in 56 places the top of the head tube 13 mm lower and 9 mm further forward, relative to the bottom bracket. Its wheelbase is 7 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −13 mm
- Lower front end
- Frame reach
- +9 mm
- Longer frame reach
- Wheelbase
- −7 mm
- Shorter: quicker to change direction
- Head angle
- +1.0°
- Steeper: sharper steering
- Chainstays
- ±0 mm
- About the same
The two frames
We can't draw these frames yet. The Trek Domane SL Gen 5 numbers we have for size L are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Domane SL Gen 5 L | Specialized Roubaix SL8 Pro 56 | Difference |
|---|---|---|---|
| Reach | 380 | 389mm | +9 mm |
| Stack | 618 | 605mm | −13 mm |
| Head tube angle | 72.0° | 73° | +1.0° |
| Effective top tube | 562 | not listed | |
| Chainstay length | 420 | 420mm | ±0 mm |
| Wheelbase | 1019 | 1012mm | −7 mm |
| BB drop | 78 | 78mm | ±0 mm |
| Standover | 826 | 787mm | −39 mm |
| Seat tube length | 553 | 485mm | −68 mm |
| Head tube length | 192 | 140mm | −52 mm |
| Seat tube angle | not listed | 73.5° | |
| BB height | not listed | 270mm | |
| Fork length | not listed | 375mm |
Differences are the Specialized Roubaix SL8 Pro minus the Trek Domane SL Gen 5. Full charts: 2027 Trek Domane SL Gen 5, 2025 Specialized Roubaix SL8 Pro.
Where each sits in its class
Trek Domane SL Gen 5Specialized 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 5SL 4 Gen 5 | Specialized Roubaix SL8 ProSL8 Pro |
|---|---|---|
| Fork | Trek Domane SL | Specialized Future Shock 3.3 |
| Shifter | Shimano Tiagra R4020 | Shimano Ultegra R8170 Di2 |
| Derailleur | Shimano Tiagra R4000 | Shimano Ultegra R8150 Di2 |
| Cassette | Shimano RS400 | Shimano Ultegra |
| Chain | Shimano LG500 | Shimano XT M8100 |
| Crankset | Shimano Tiagra R4000 | Shimano Ultegra R8100 |
| Tire | Bontrager Kwaremont Comp | Specialized S-Works Mondo 2BR |
| Hub | Formula RX-142, Formula RX-512 | not listed |
| Rim | Bontrager Paradigm 23 | not listed |
| Rotor | Tektro TR160 | not listed |
| Headset | Bontrager Expander Plug | not listed |
| Saddle | Trek Verse | Specialized Power Pro Mirror |
| Wheelset | not listed | Roval Terra CL II |
| Brake | not listed | Shimano Ultegra |
| Stem | not listed | Specialized Future |
| Seatpost | not listed | Specialized S-Works Pave Seat post |
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