Metalcloak IQ: Wheel Offset & Backspace Converter
Wheel Offset & Backspace Calculator
Convert between wheel offset and backspace measurements
Essential for proper wheel fitment and clearance
inches
millimeters (+ or -)
Backspace
0inches
Distance from mounting surface to inner edge
Frontspace
0inches
Distance from mounting surface to outer edge
inches
inches
Wheel Offset
0mm
Distance from centerline to mounting surface
Frontspace
0inches
Distance from mounting surface to outer edge
???? Understanding Wheel Measurements
Wheel Offset: Distance in millimeters from the wheel's centerline to the mounting surface. Can be positive (+), negative (-), or zero.
Backspace: Distance in inches from the mounting surface to the inner edge of the wheel.
Frontspace: Distance in inches from the mounting surface to the outer edge of the wheel.
| Wheel Width | Zero Offset Backspace | +25mm Offset Backspace | -25mm Offset Backspace |
|---|---|---|---|
| 7.0" | 4.0" | 4.98" | 3.02" |
| 7.5" | 4.25" | 5.23" | 3.27" |
| 8.0" | 4.5" | 5.48" | 3.52" |
| 8.5" | 4.75" | 5.73" | 3.77" |
| 9.0" | 5.0" | 5.98" | 4.02" |
| 9.5" | 5.25" | 6.23" | 4.27" |
| 10.0" | 5.5" | 6.48" | 4.52" |
| 10.5" | 5.75" | 6.73" | 4.77" |
| 11.0" | 6.0" | 6.98" | 5.02" |
| 12.0" | 6.5" | 7.48" | 5.52" |
⚠️ Important Notes:
- Positive Offset: Mounting surface toward the front (street side) of wheel
- Negative Offset: Mounting surface toward the back (brake side) of wheel
- Zero Offset: Mounting surface at the exact centerline of wheel
- Clearance: Always check brake, suspension, and fender clearance before installation