Bmc Roadmachine X THREE
An all-round road bike from 2025, made in 6 sizes from 47 to 61. Fits tyres up to 40 mm.
Size
Stack 570 mmReach 383 mm
Geometry
| Size | ||||||
|---|---|---|---|---|---|---|
| Fit | ||||||
| Stack (mm)How high the front sits | 525 | 550 | 570 | 595 | 620 | 645 |
| Reach (mm)How far forward the bars start | 370 | 379 | 383 | 388 | 393 | 398 |
| Stack ÷ reach Higher = more upright | 1.42 | 1.45 | 1.49 | 1.53 | 1.58 | 1.62 |
| Top tube (effective) (mm)Horizontal top-tube length | 520 | 537 | 546 | 559 | 571 | 581 |
| Seat tube angle Saddle position over the pedals | 74.2° | 74.2° | 74.2° | 74.2° | 74.2° | 74.2° |
| Seat tube length (mm)Frame size reference | 414 | 461 | 488 | 508 | 529 | 550 |
| Head tube length (mm)Front-end height | 112 | 138 | 154 | 181 | 207 | 233 |
| Standover (mm)Clearance when you stop | 726 | 762 | 786 | 807 | 828 | 849 |
| Handling | ||||||
| Head tube angle Steeper = quicker steering | 71.4° | 71.4° | 72.2° | 72.2° | 72.2° | 72.2° |
| Fork offset (mm)Fork rake | 50 | 50 | 45 | 45 | 45 | 45 |
| Trail (mm)More = steadier steering | 63 | 63 | 63 | 63 | 63 | 63 |
| Wheelbase (mm)Longer = more stable | 982 | 1000 | 997 | 1010 | 1023 | 1036 |
| Chainstay (mm)Shorter = snappier | 415 | 415 | 415 | 415 | 415 | 415 |
| BB drop (mm)More = lower centre of gravity | 75 | 75 | 75 | 75 | 75 | 75 |
| BB height (mm)Pedal clearance in corners | 261 | 261 | 261 | 261 | 261 | 261 |
| Front centre (mm)Room for your toes | 579 | 596 | 594 | 607 | 620 | 633 |
Underlined values are calculated by BikeLens. A dash means the brand doesn't publish it.
How it rides
All-round
Between race and comfort. A good fit for sportives, club rides and fast days out.
Handling, size 54
- Steering
- Steady63 mm trail
- Wheelbase
- Balanced997 mm
- Chainstays
- Balanced415 mm
- BB drop
- Low75 mm
Bikes that fit like it
The closest road frames from other ranges, against size 54 here.
| Bike | Size | Stack | Reach |
|---|---|---|---|
| Basso Venta R2026Stack +1 mm, reach −2 mm | 53 | +1 mm | −2 mm |
| Bianchi Infinito XE 105 Di22025Stack −1 mm, reach −2 mm | 55 | −1 mm | −2 mm |
| Cannondale Synapse 12026Stack same, reach −2 mm | 54 | same | −2 mm |
| Kross VENTO DSC 5.02026Stack +4 mm, reach +1 mm | M | +4 mm | +1 mm |
| Giant Contend AR 12026Stack +4 mm, reach −3 mm | M | +4 mm | −3 mm |
| Grind Grit2026Stack +1 mm, reach −5 mm | M | +1 mm | −5 mm |
Other versions
Same frame, different parts
These builds share this exact geometry, so they fit the same.