Tire & Wheel Calculators
Wheel & Offset Tools

Wheel Offset Comparison

Wheel Offset Comparison. Calculate offset, backspacing and nominal wheel position. Calculations run in your browser; entered tire and wheel values are not uploaded.

Inputs
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Calculations run in your browser; entered tire and wheel values are not uploaded.
ⓘCalculated dimensions are nominal values based on tire-size notation; actual measured dimensions vary. These calculators compare nominal tire and wheel geometry. Actual fitment depends on the vehicle, wheel, tire model, suspension, brake clearance, load/speed ratings and local requirements. Verify final fitment before purchase or installation.

Formula & method

Inner position = width/2 + offset; outer position = width/2 − offset. Positive inner change means closer to suspension; positive outer change means farther outward.

Example

8.0 in ET35 → 9.0 in ET25: inner edge +2.7 mm closer; outer edge +22.7 mm outward.

Limitations

Calculated dimensions are nominal values based on tire-size notation; actual measured dimensions vary. These calculators compare nominal tire and wheel geometry. Actual fitment depends on the vehicle, wheel, tire model, suspension, brake clearance, load/speed ratings and local requirements. Verify final fitment before purchase or installation.