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Tire Size Calculator

Compare tire sizes and calculate speedometer error.

Original Tire

Width (mm)

Aspect Ratio

Wheel (in)

New Tire

Width (mm)

Aspect Ratio

Wheel (in)

Comparison Results

Original Tire

Size -

Diameter -

Circumference -

Sidewall Height -

Revs/Mile -

New Tire

Size -

Diameter -

Circumference -

Sidewall Height -

Revs/Mile -

-

Speedometer Error

Diameter Difference -

When Speedo Shows 60 MPH -

DISCLAIMER: These calculators are for EDUCATIONAL AND ESTIMATION PURPOSES ONLY. Verify tire fitment with a professional before making changes.

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