2024 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 44 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 44, the Trek Domane SL Gen 2 Rim in 50 places the top of the head tube 3 mm higher and 15 mm further forward, relative to the bottom bracket.
- Frame stack
- +3 mm
- Higher front end
- Frame reach
- +15 mm
- Longer frame reach
- Wheelbase
- +2 mm
- About the same
- Head angle
- +1.8°
- Steeper: sharper steering
- 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 44 | Trek Domane SL Gen 2 Rim 50 | Difference |
|---|---|---|---|
| Reach | 353mm | 368 | +15 mm |
| Stack | 543mm | 546 | +3 mm |
| Head tube angle | 69.3° | 71.1° | +1.8° |
| Seat tube angle | 75° | not listed | |
| Chainstay length | 418mm | 420 | +2 mm |
| Wheelbase | 994mm | 996 | +2 mm |
| BB drop | 80mm | 80 | ±0 mm |
| BB height | 269mm | not listed | |
| Standover | 686mm | 716 | +30 mm |
| Seat tube length | 365mm | 450 | +85 mm |
| Fork length | 375mm | not listed | |
| Head tube length | 90mm | 130 | +40 mm |
| Effective top tube | not listed | 519 |
Differences are the Trek Domane SL Gen 2 Rim minus the Specialized Roubaix SL8 Sport. Full charts: 2024 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.
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