2025 Specialized Roubaix SL8 FACT 12R Carbon vs 2024 Trek Domane AL Rim
The 50 is the Trek Domane AL Rim size closest to your 44 Specialized Roubaix SL8 FACT 12R Carbon. 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 AL Rim
Compared with the Specialized Roubaix SL8 FACT 12R Carbon in 44, the Trek Domane AL 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 FACT 12R Carbon is drawn. The Trek Domane AL Rim numbers we have for size 50 are missing the seat angle.
Geometry side by side
| Measurement | Specialized Roubaix SL8 FACT 12R Carbon 44 | Trek Domane AL 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 | |
| Effective top tube | 503mm | 519 | +16 mm |
| 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 |
Differences are the Trek Domane AL Rim minus the Specialized Roubaix SL8 FACT 12R Carbon. Full charts: 2025 Specialized Roubaix SL8 FACT 12R Carbon, 2024 Trek Domane AL Rim.
Where each sits in its class
Specialized Roubaix SL8 FACT 12R CarbonTrek Domane AL 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 FACT 12R CarbonS-Works SL8 FACT 12R Carbon | Trek Domane AL RimAL 2 Rim |
|---|---|---|
| Fork | Specialized Future Shock 3.3 | Trek Domane |
| Seatpost | Specialized S-Works Pave Seat post | not listed |
| Frame | not listed | Trek Alpha |
| Shifter | not listed | Shimano Claris R2000 |
| Derailleur | not listed | Shimano Claris R2000 |
| Cassette | not listed | Shimano HG-31 |
| Chain | not listed | Shimano Sora HG71 |
| Crankset | not listed | Shimano RS200 |
| Bottom bracket | not listed | Shimano UN26 |
| Tire | not listed | Bontrager R1 Hard-Case Lite |
| Hub | not listed | Formula TK-31, Formula TK-32 |
| Handlebar | not listed | Bontrager Comp VR-C |
| Saddle | not listed | Bontrager P3 Verse |
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