Tire Size Calculator & Comparison
Compare two tire sizes and calculate exact specifications, differences in dimensions, and speedometer error.
Tire 1 (Original)
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R
Presets:
Tire 2 (New)
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R
Presets:
Frequently Asked Questions
How do I read a tire size?
A tire size like 205/55R16 means the tire is 205mm wide, the sidewall height is 55% of the width, it is of Radial construction, and fits a 16-inch wheel.
What is speedometer error?
If you install tires with a different overall diameter than the original factory tires, your speedometer will read incorrectly. Larger tires will cause the speedometer to read slower than your actual speed, while smaller tires will cause it to read faster.