2024 Trek Domane SLR Gen 4 vs 2025 Specialized Roubaix SL8 Pro
The 56 is the Specialized Roubaix SL8 Pro size closest to your 58 Trek Domane SLR 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 SLR Gen 4 in 58, the Specialized Roubaix SL8 Pro in 56 places the top of the head tube 6 mm lower and 9 mm further forward, relative to the bottom bracket. Its wheelbase is 10 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −6 mm
- Lower front end
- Frame reach
- +9 mm
- Longer frame reach
- Wheelbase
- −10 mm
- Shorter: quicker to change direction
- Head angle
- +1.0°
- Steeper: sharper steering
- Chainstays
- −5 mm
- Shorter: livelier
The two frames
We can't draw these frames yet. The Trek Domane SLR Gen 4 numbers we have for size 58 are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Domane SLR Gen 4 58 | Specialized Roubaix SL8 Pro 56 | Difference |
|---|---|---|---|
| Reach | 380 | 389mm | +9 mm |
| Stack | 611 | 605mm | −6 mm |
| Head tube angle | 72.0° | 73° | +1.0° |
| Effective top tube | 567 | not listed | |
| Chainstay length | 425 | 420mm | −5 mm |
| Wheelbase | 1022 | 1012mm | −10 mm |
| BB drop | 78 | 78mm | ±0 mm |
| Standover | 796 | 787mm | −9 mm |
| Seat tube length | 548 | 485mm | −63 mm |
| Head tube length | 195 | 140mm | −55 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 SLR Gen 4. Full charts: 2024 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 4SLR 6 AXS Gen 4 | Specialized Roubaix SL8 ProSL8 Pro |
|---|---|---|
| Frame | Trek Domane SLR | not listed |
| Shifter | SRAM eTap AXS Rival | Shimano Ultegra R8170 Di2 |
| Derailleur | SRAM D1 AXS Rival | Shimano Ultegra R8150 Di2 |
| Chain | SRAM Rival | Shimano XT M8100 |
| Crankset | SRAM AXS Rival | Shimano Ultegra R8100 |
| Wheelset | Bontrager Aeolus Pro 37 | Roval Terra CL II |
| Brake | SRAM Rival | Shimano Ultegra |
| Handlebar | Bontrager Pro IsoCore VR-SF | not listed |
| Stem | Trek RCS | Specialized Future |
| Saddle | Verse Short Elite | Specialized Power Pro Mirror |
| Fork | not listed | Specialized Future Shock 3.3 |
| Cassette | not listed | Shimano Ultegra |
| Tire | not listed | Specialized S-Works Mondo 2BR |
| Seatpost | not listed | Specialized S-Works Pave Seat post |
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