Tire Size Calculator
Compare two tire sizes and check for speedometer error.
Tire 1 (Stock)
/
R
Tire 2 (New)
/
R
Reading Tire Sizes
Example: 205/55R16
- 205: Width in millimeters.
- 55: Aspect Ratio (height is 55% of width).
- 16: Rim Diameter in inches.
Changing tire sizes can affect your speedometer accuracy, fuel economy, and transmission shift points. It is generally recommended to keep the diameter within 3% of the factory size.