Auto & Transport
Wheel Offset Calculator - Calculate wheel offset and backspacing
Calculate wheel offset and backspacing
Formulas and edge cases are reviewed against authoritative references before publication. For methodology, editorial standards, or corrections, use the links below.
Frequently asked questions
What is wheel offset?
Distance from wheel centerline to mounting surface. Positive = hub mounting surface toward outside.
What is backspacing?
Distance from mounting surface to inner edge of wheel. Higher = wheel sits further in.
Will lower offset cause rubbing?
Lower offset pushes wheel outward. May rub fenders on turns or over bumps.
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About this tool
This Wheel Offset Calculator turns your inputs into practical results. Provide Wheel Width, Offset (ET), and Original Wheel Width to calculate Backspacing and Inner Clearance Change.
Adjust values to compare scenarios and see how sensitive the result is. The calculation uses the numbers as entered, so double-check units and expect small differences from rounding in the displayed totals.