2027 BMC Roadmachine THREE vs 2026 Specialized Roubaix SL8 Sport
The 56 is the Specialized Roubaix SL8 Sport size closest to your 56 BMC Roadmachine THREE. 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 Sport
Compared with the BMC Roadmachine THREE in 56, the Specialized Roubaix SL8 Sport in 56 places the top of the head tube 10 mm higher and about as far forward, relative to the bottom bracket.
- Frame stack
- +10 mm
- Higher front end
- Frame reach
- +1 mm
- About the same reach
- Wheelbase
- n/a
- One of the bikes has no number for this
- Head angle
- +0.8°
- Steeper: sharper steering
- Chainstays
- +5 mm
- Longer: more planted
The two frames
Only the BMC Roadmachine THREE is drawn. The Specialized Roubaix SL8 Sport numbers we have for size 56 are missing the wheelbase.
Geometry side by side
| Measurement | BMC Roadmachine THREE 56 | Specialized Roubaix SL8 Sport 56 | Difference |
|---|---|---|---|
| Reach | 388 | 389 | +1 mm |
| Stack | 595 | 605 | +10 mm |
| Head tube angle | 72.2 | 73 | +0.8° |
| Seat tube angle | 74.2 | 73.5 | −0.7° |
| Effective top tube | 559 | 569 | +10 mm |
| Chainstay length | 415 | 420 | +5 mm |
| Wheelbase | 1010 | not listed | |
| BB drop | 75 | 78 | +3 mm |
| Standover | 807 | 787 | −20 mm |
| Seat tube length | 508 | 485 | −23 mm |
| Fork length | 379 | 375 | −4 mm |
| Head tube length | 181 | 140 | −41 mm |
| BB height | not listed | 270 |
Differences are the Specialized Roubaix SL8 Sport minus the BMC Roadmachine THREE. Full charts: 2027 BMC Roadmachine THREE, 2026 Specialized Roubaix SL8 Sport.
Where each sits in its class
BMC Roadmachine THREESpecialized Roubaix SL8 Sport
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 | BMC Roadmachine THREETHREE | Specialized Roubaix SL8 SportSL8 Sport |
|---|---|---|
| Frame | BMC Roadmachine Gen 3 | Specialized FACT 10R |
| Shifter | Shimano 105 R7120 | Shimano 105 R7120 |
| Derailleur | Shimano 105 R7100 | Shimano 105 Di2, Shimano 105 R7100 |
| Chain | Shimano Deore M6100 | Shimano SLX M7100 |
| Crankset | Shimano 105 R7100 | Shimano 105 |
| Tire | Vittoria Rubino V | Specialized Mondo |
| Rim | PRD23 | not listed |
| Brake | Shimano 105 R7170 | Shimano CUES |
| Rotor | Shimano SM-RT64 | not listed |
| Stem | BMC RSM 01 | Specialized Future Pro |
| Bar tape | BMC Tacky | not listed |
| Seatpost | BMC Roadmachine Carbon D-shaped | Specialized Pavé |
| Saddle | Selle Italia Model X Greentech | Specialized Power Sport |
| Light | Integrated Rear Light 25 | not listed |
| Fork | not listed | Specialized Future Shock 3.2 |
| Cassette | not listed | Shimano 105 |
| Bottom bracket | not listed | Shimano Threaded BSA |
| Wheelset | not listed | DT Swiss G540 |
| Handlebar | not listed | Specialized Hover |
| Grips | not listed | Supacaz Super Sticky Kush |
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