Tire Size Comparison Calculator

Use this tool to compare two tire sizes.  The tool can be useful for finding out whether or not an alternative tire size is compatible with your vehicle.

Original Tire Size

/R

Select a size: 
  Imperial Metric
Section Width:
Rim Diameter:
Overall Diameter:
Sidewall Height:
Radius:
Circumference:
Revolutions:

New Tire Size

/R

Select a size: 
  Imperial Metric
Section Width:
Rim Diameter:
Overall Diameter:
Sidewall Height:
Radius:
Circumference:
Revolutions:

Difference

Choose a measurement system

  Imperial   Metric
Difference Percent
Speed Variance When your speedometer reads with the new tires, your vehicle will actually be traveling at , which is than the original tires.
Diameter Variance The overall diameter variance of the new tire is , which is different than the original.  You should never go beyond 3% of the original tire, otherwise you run the risk of brake failure.