| Backspacing, current | |
| Backspacing, new | |
| Outer lip moves outward (toward fender) | |
| Inner lip moves inward (toward strut) |
Backspacing = width / 2 + offset / 25.4 + 0.5 in flange allowance. Negative values mean more clearance than the current wheel. Calculator by ANKUSI Wheels, full version with tire diameter and speedometer error.