Tire Size Calculator

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Tire Size Calculator & Conversion

This tool can be used to compare two tire sizes.

Existing Tire Size

Example: 245/40-19

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New Tire Size

Example: 275/30-20

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Sidewall:

Radius (Wheel + Tire):

Diameter:

Circumference:

Revs/Mile:

Sidewall:

Radius (Wheel + Tire):

Diameter:

Circumference:

Revs/Mile:

Difference: