2023 Trek Domane AL Rim vs 2025 Specialized Roubaix SL8 Pro
The 56 is the Specialized Roubaix SL8 Pro size closest to your 58 Trek Domane AL Rim. 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 AL Rim 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 AL Rim numbers we have for size 58 are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Domane AL Rim 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 AL Rim. Full charts: 2023 Trek Domane AL Rim, 2025 Specialized Roubaix SL8 Pro.
Where each sits in its class
Trek Domane AL RimSpecialized 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 AL RimAL 2 Rim | Specialized Roubaix SL8 ProSL8 Pro |
|---|---|---|
| Frame | Trek Alpha | not listed |
| Fork | Trek Domane | Specialized Future Shock 3.3 |
| Shifter | Shimano Claris R2000 | Shimano Ultegra R8170 Di2 |
| Derailleur | Shimano Claris R2000 | Shimano Ultegra R8150 Di2 |
| Cassette | Shimano HG-31 | Shimano Ultegra |
| Chain | Shimano Sora HG71 | Shimano XT M8100 |
| Crankset | Shimano RS200 | Shimano Ultegra R8100 |
| Bottom bracket | Shimano UN26 | not listed |
| Tire | Bontrager R1 Hard-Case Lite | Specialized S-Works Mondo 2BR |
| Hub | Formula TK-31, Formula TK-32 | not listed |
| Handlebar | Bontrager Comp VR-C | not listed |
| Saddle | Bontrager P3 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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