Metric / Inch Tire Size Converter
Enter your tire size information into one side of the tire size converter below to convert metric tire sizes to inches or inch tire sizes to their metric equivalents.
Metric and Inch Tires Sizes
While standard SAE tire sizes are easy to understand (a 35x12.50-16 tire runs 35 inches tall by 12.5 inches wide for a 16 inch wheel), many popular tires, particularly those under 35" tall, use harder to visualize metric dimensions (a 315/75R16 tire is 315 mm wide with a sidewall height that is 75% of the width for a 16 inch wheel). Converting a metric tire to inches can be done with the equation below, however, the above calculator is much easier!
Popular Tire Size Equivalents
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Helpful Tire Size Tips
- If upgrading to larger tires, use our gear ratio calculator to find your recommended gear ratio.
- Tire width is the maximum width of the tire which is usually at the sidewall of an inflated tire.
- Tread width is the actual width of the tire tread (which is normally less than the tire width).
- An "LT" after the tire size indicates that the tire is designed for "Light Truck" use.
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Data is accurate to the best of our knowledge and is offered as-is with no guarantee.
Related Wheel and Tire Guides:
Wheel Dimensions Guide - Wheel dimensions, backspacing, and offset explained.
Wheel Bolt Pattern Guide - A list of common bolt patterns listed by vehicle and basic lug nut details.
Wheel Offset to Backspacing Conversion - A chart to convert wheel offset to backspacing.
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