2025 Specialized Roubaix SL8 Sport vs 2025 Trek Domane SL Gen 2 Rim
The 50 is the Trek Domane SL Gen 2 Rim size closest to your 49 Specialized Roubaix SL8 Sport. 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 Trek Domane SL Gen 2 Rim
Compared with the Specialized Roubaix SL8 Sport in 49, the Trek Domane SL Gen 2 Rim in 50 places the top of the head tube 3 mm lower and 5 mm further forward, relative to the bottom bracket. Its wheelbase is 4 mm longer, which can contribute to stability at speed.
- Frame stack
- −3 mm
- Lower front end
- Frame reach
- +5 mm
- Longer frame reach
- Wheelbase
- +4 mm
- Longer: steadier at speed
- Head angle
- +0.3°
- About the same head angle
- Chainstays
- +2 mm
- About the same
The two frames
Only the Specialized Roubaix SL8 Sport is drawn. The Trek Domane SL Gen 2 Rim numbers we have for size 50 are missing the seat angle.
Geometry side by side
| Measurement | Specialized Roubaix SL8 Sport 49 | Trek Domane SL Gen 2 Rim 50 | Difference |
|---|---|---|---|
| Reach | 363mm | 368 | +5 mm |
| Stack | 549mm | 546 | −3 mm |
| Head tube angle | 70.8° | 71.1° | +0.3° |
| Seat tube angle | 74° | not listed | |
| Effective top tube | 523mm | 519 | −4 mm |
| Chainstay length | 418mm | 420 | +2 mm |
| Wheelbase | 992mm | 996 | +4 mm |
| BB drop | 80mm | 80 | ±0 mm |
| BB height | 269mm | not listed | |
| Standover | 719mm | 716 | −3 mm |
| Seat tube length | 410mm | 450 | +40 mm |
| Fork length | 375mm | not listed | |
| Head tube length | 90mm | 130 | +40 mm |
Differences are the Trek Domane SL Gen 2 Rim minus the Specialized Roubaix SL8 Sport. Full charts: 2025 Specialized Roubaix SL8 Sport, 2025 Trek Domane SL Gen 2 Rim.
Where each sits in its class
Specialized Roubaix SL8 SportTrek Domane SL Gen 2 Rim
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 | Specialized Roubaix SL8 SportSL8 Sport | Trek Domane SL Gen 2 Rim |
|---|---|---|
| Fork | Specialized Future Shock 3.1 | not listed |
| Shifter | Shimano 105 R7120 | not listed |
| Derailleur | Shimano 105, Shimano 105 R7100 mechanical | not listed |
| Cassette | Shimano 105 | not listed |
| Chain | Shimano 105 | not listed |
| Crankset | Shimano 105 | not listed |
| Wheelset | DT Swiss G540 | not listed |
| Tire | Specialized S-Works Mondo 2BR | not listed |
| Brake | Shimano 105 | not listed |
| Handlebar | Specialized Hover | not listed |
| Stem | Specialized Future | not listed |
| Seatpost | Specialized S-Works Pave Seat post | not listed |
| Saddle | Specialized Power Sport | not listed |
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