Roadmachine FOUR
BMC
Endurance
Roadmachine FOUR is a carbon endurance road bike (2024), by BMC, from the Roadmachine lineup. Rider-wise, it fits a wide range of riders thanks to its fit flexibility, with a balanced riding position, with a surface profile that is best matched to paved roads. Standout strengths from the metrics include good fit flexibility for dialing in rider position, strong climbing friendliness for sustained uphill riding, and balanced, versatile speed for everyday riding. At the same time, relative to category specialists, the trade-off is a value score that depends more on priorities than pure price efficiency. Compare this bike across categories on MatchBikes.com to see whether a nearby segment gives you a better fit.
Rating

Score Summary
Performance
Built for speed and efficiency
Fit
Dialed-in Fit & Comfort
Value
Specifications
General
Frame
Drivetrain
Wheels
Brakes
Cockpit
Seat
Geometry
| Measurement | 47cm | 51cm | 54cm | 56cm | 58cm | 61cm |
|---|---|---|---|---|---|---|
| Stack Reach Ratio | 1.419 mm | 1.451 mm | 1.488 mm | 1.534 mm | 1.578 mm | 1.621 mm |
| Bottom Bracket Height | 261 mm | 261 mm | 261 mm | 261 mm | 261 mm | 261 mm |
| Front Center | 579 mm | 596 mm | 594 mm | 607 mm | 620 mm | 633 mm |
| Rake | 50 mm | 50 mm | 45 mm | 45 mm | 45 mm | 45 mm |
| Trail | 63 mm | 63 mm | 63 mm | 63 mm | 63 mm | 63 mm |
| Stack | 525 mm | 550 mm | 570 mm | 595 mm | 620 mm | 645 mm |
| Reach | 370 mm | 379 mm | 383 mm | 388 mm | 393 mm | 398 mm |
| Top Tube Length | 520 mm | 537 mm | 546 mm | 559 mm | 571 mm | 581 mm |
| Seat Tube Angle | 74.2 ° | 74.2 ° | 74.2 ° | 74.2 ° | 74.2 ° | 74.2 ° |
| Seat Tube Length | 414 mm | 461 mm | 488 mm | 508 mm | 529 mm | 550 mm |
| Head Tube Angle | 71.4 ° | 71.4 ° | 72.2 ° | 72.2 ° | 72.2 ° | 72.2 ° |
| Head Tube Length | 112 mm | 138 mm | 154 mm | 181 mm | 207 mm | 233 mm |
| Chainstay Length | 415 mm | 415 mm | 415 mm | 415 mm | 415 mm | 415 mm |
| Wheelbase | 982 mm | 1000 mm | 997 mm | 1010 mm | 1023 mm | 1036 mm |
| Bottom Bracket Drop | 75 mm | 75 mm | 75 mm | 75 mm | 75 mm | 75 mm |
| Standover Height | 726 mm | 762 mm | 786 mm | 807 mm | 828 mm | 849 mm |
| Wheels | 700 | 700 | 700 | 700 | 700 | 700 |
| Rider Max Height | 160 cm | 174 cm | 180 cm | 186 cm | 192 cm | cm |




























































