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Tire Size Conversions

Decode and convert tire sizes between metric (225/45R17) and imperial formats.
Calculate diameter, section width, and circumference for fitment checks.

Tire Size Converter

Decode metric tire sizes like 225/45R17 and calculate diameter, sidewall height, and circumference. Compare original and new sizes for speedometer accuracy.
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Embed This Calculator

Copy the code below and paste it into your website or blog.
The calculator will work directly on your page.