Wheel Offset Calculator
Calculate the wheel offset, backspacing, and frontspacing based on wheel width and offset value.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the Wheel Offset Calculator
- Enter Wheel Width in inches (e.g., 8.5). Use decimal values if needed.
- Enter Offset in millimeters (e.g., 35). Positive or negative values are allowed.
- Click "Calculate" to get results.
Results explained:
- Backspacing – distance from wheel mounting surface to inner edge (inches).
- Frontspacing – distance from mounting surface to outer edge (inches).
- Offset (mm) – your input value repeated for reference.
Note: All inputs use inches for width and millimeters for offset. The formula converts offset to inches for calculation.
Previous Results
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Frequently Asked Questions
Wheel offset is the distance from the wheel's mounting surface to the centerline of the wheel, usually measured in millimeters.
Backspacing is the distance from the mounting surface to the back edge of the wheel, while offset is measured to the centerline. Backspacing includes half the wheel width plus offset.
Yes, as long as you input the wheel width in inches and offset in millimeters, the calculator works for any size.