Wheel Specifications
Backspace (or Rear Spacing)
The distance from the extreme back edge of the rim to the mounting surface.
Offset
The distance from the centerline of the wheel to the face of the mounting surface of the wheel.
Pitch Center Diameter (PCD)
Bolt Pattern
X Factor
Caliper Clearance
Offset Conversion Chart
MM OFFSET TO BACKSPACE IN INCHES
| BACKSPACE | 3.25" | 3.5" | 3.75" | 4" | 4.25" | 4.5" | 4.75" | 5" | 5.25" | 5.5" | 5.75" | 6" | 6.25" | 6.5" | 6.75" | 7" | 7.25" | 7.5" | 7.75" | 8" | 8.25" | 8.5" | 8.75" | 9" | 9.25" | 9.5" |
| Wheel Width | ||||||||||||||||||||||||||
| 5" | 6 | 12 | 19 | 25 | 32 | 38 | 44 | 51 | 57 | 63 | 69 | 76 | ||||||||||||||
| 5.5" | 0 | 6 | 12 | 19 | 25 | 32 | 38 | 44 | 51 | 57 | 63 | 69 | 76 | |||||||||||||
| 6" | -6 | 0 | 6 | 12 | 19 | 25 | 32 | 38 | 44 | 51 | 57 | 63 | 69 | 76 | ||||||||||||
| 6.5" | -12 | -6 | 0 | 6 | 12 | 19 | 25 | 32 | 38 | 44 | 51 | 57 | 63 | 69 | 76 | |||||||||||
| 7" | -19 | -12 | -6 | 0 | 6 | 12 | 19 | 25 | 32 | 38 | 44 | 51 | 57 | 63 | 69 | 76 | ||||||||||
| 7.5" | -25 | -19 | -12 | -6 | 0 | 6 | 12 | 19 | 25 | 32 | 38 | 44 | 51 | 57 | 63 | 69 | 76 | |||||||||
| 8" | -32 | -25 | -19 | -12 | -6 | 0 | 6 | 12 | 19 | 25 | 32 | 38 | 44 | 51 | 57 | 63 | 69 | 76 | ||||||||
| 8.5" | -38 | -32 | -25 | -19 | -12 | -6 | 0 | 6 | 12 | 19 | 25 | 32 | 38 | 44 | 51 | 57 | 63 | 69 | 76 | |||||||
| 9" | -44 | -38 | -32 | -25 | -19 | -12 | -6 | 0 | 6 | 12 | 19 | 25 | 32 | 38 | 44 | 51 | 57 | 63 | 69 | 76 | ||||||
| 9.5" | -51 | -44 | -38 | -32 | -25 | -19 | -12 | -6 | 0 | 6 | 12 | 19 | 25 | 32 | 38 | 44 | 51 | 57 | 63 | 69 | 76 | |||||
| 10" | -57 | -51 | -44 | -38 | -32 | -25 | -19 | -12 | -6 | 0 | 6 | 12 | 19 | 25 | 32 | 38 | 44 | 51 | 57 | 63 | 69 | 76 | ||||
| 10.5" | -63 | -57 | -51 | -44 | -38 | -32 | -25 | -19 | -12 | -6 | 0 | 6 | 12 | 19 | 25 | 32 | 38 | 44 | 51 | 57 | 63 | 69 | 76 | |||
| 11" | -69 | -63 | -57 | -51 | -44 | -38 | -32 | -25 | -19 | -12 | -6 | 0 | 6 | 12 | 19 | 25 | 32 | 38 | 44 | 51 | 57 | 63 | 69 | 76 | ||
| 11.5" | -75 | -69 | -63 | -57 | -51 | -44 | -38 | -32 | -25 | -19 | -12 | -6 | 0 | 6 | 12 | 19 | 25 | 32 | 38 | 44 | 51 | 57 | 63 | 69 | 76 | |
| 12" | -81 | -75 | -69 | -63 | -57 | -51 | -44 | -38 | -32 | -25 | -19 | -12 | -6 | 0 | 6 | 12 | 19 | 25 | 32 | 38 | 44 | 51 | 57 | 63 | 69 | 76 |