Revs per mile / km calculator
How many times does a tire turn per mile?
Wheel revolutions are circumference-based: revs per mile = 1,609,344 mm divided by tire circumference in millimetres. A taller tire has a larger circumference, so it turns fewer times per mile or kilometre. That affects odometer reading, gearing, cruise RPM and comparison tables.
| Metric | Current | Comparison | Difference |
|---|---|---|---|
| Overall diameter | 634.3 mm | 645.2 mm | +10.9 mm |
| Circumference | 1,992.7 mm | 2,027.0 mm | +34.2 mm |
| Revs per km | 501.8 | 493.4 | -8.5 |
| Revs per mile | 807.6 | 794.0 | -13.6 |
Computed from nominal tire geometry. Actual rolling circumference varies with load, pressure, tread depth and rim width.
More tools
- Engine RPM at speed calculator
- Gear ratio calculator (tyre size change)
- Speedometer error calculator
- Tire size calculator
- Speedometer error guide
What changed
- Reviewed deterministic geometry, load/speed references, sitemap inclusion and localized page shell.