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About Compare Tire Sizes

Compare Tire Sizes is a simple, static tire size comparison tool for drivers, enthusiasts, and shoppers who want quick tire geometry before changing sizes. The calculator focuses on the measurements that matter most in the US market: overall diameter, circumference, sidewall height, revolutions per mile, ground clearance, and speedometer change.

The site is intentionally small and fast. It does not require an account, database, server runtime, or paid API. Calculator results are estimates based on published tire-size formulas, so they should be used as a planning tool rather than a final fitment guarantee.

Before buying tires, verify the exact tire model specifications, load rating, speed rating, wheel width, wheel offset, and clearance on your vehicle. A qualified tire shop can confirm fitment for your specific setup.