2027 BMC Roadmachine THREE vs 2025 Cervélo Caledonia-5
The 51 is the Cervélo Caledonia-5 size closest to your 47 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 Cervélo Caledonia-5
Compared with the BMC Roadmachine THREE in 47, the Cervélo Caledonia-5 in 51 places the top of the head tube 5 mm higher and about as far forward, relative to the bottom bracket. Its wheelbase is 4 mm longer, which can contribute to stability at speed.
- Frame stack
- +5 mm
- Higher front end
- Frame reach
- −1 mm
- About the same reach
- Wheelbase
- +4 mm
- Longer: steadier at speed
- Head angle
- +0.1°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
BMC Roadmachine THREE, 47Cervélo Caledonia-5, 51Drawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | BMC Roadmachine THREE 47 | Cervélo Caledonia-5 51 | Difference |
|---|---|---|---|
| Reach | 370 | 369 | −1 mm |
| Stack | 525 | 530 | +5 mm |
| Head tube angle | 71.4 | 71.5 | +0.1° |
| Seat tube angle | 74.2 | 74 | −0.2° |
| Effective top tube | 520 | 522 | +2 mm |
| Chainstay length | 415 | 415 | ±0 mm |
| Wheelbase | 982 | 985.6 | +4 mm |
| BB drop | 75 | 76.5 | +2 mm |
| Standover | 726 | 743 | +17 mm |
| Seat tube length | 414 | not listed | |
| Fork length | 379 | not listed | |
| Head tube length | 112 | 110.3 | −2 mm |
Differences are the Cervélo Caledonia-5 minus the BMC Roadmachine THREE. Full charts: 2027 BMC Roadmachine THREE, 2025 Cervélo Caledonia-5.
Where each sits in its class
BMC Roadmachine THREECervélo Caledonia-5
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 | Cervélo Caledonia-5 |
|---|---|---|
| Frame | BMC Roadmachine Gen 3 | not listed |
| Shifter | Shimano 105 R7120 | not listed |
| Derailleur | Shimano 105 R7100 | not listed |
| Chain | Shimano Deore M6100 | not listed |
| Crankset | Shimano 105 R7100 | not listed |
| Tire | Vittoria Rubino V | not listed |
| Rim | PRD23 | not listed |
| Brake | Shimano 105 R7170 | not listed |
| Rotor | Shimano SM-RT64 | not listed |
| Stem | BMC RSM 01 | not listed |
| Bar tape | BMC Tacky | not listed |
| Seatpost | BMC Roadmachine Carbon D-shaped | not listed |
| Saddle | Selle Italia Model X Greentech | not listed |
| Light | Integrated Rear Light 25 | not listed |
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