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

145/65R15

Select a size: 
  Imperial Metric
Section Width: 5.71 in 145 mm
Rim Diameter: 15.00 in 381 mm
Overall Diameter: 22.42 in 569 mm
Sidewall Height: 3.71 in 94 mm
Radius: 11.21 in 285 mm
Circumference: 70.43 in 1,788 mm
Revolutions: 899.56/mi 559.42/k

New Tire Size

145/65R15

Select a size: 
  Imperial Metric
Section Width: 5.71 in 145 mm
Rim Diameter: 15.00 in 381 mm
Overall Diameter: 22.42 in 569 mm
Sidewall Height: 3.71 in 94 mm
Radius: 11.21 in 285 mm
Circumference: 70.43 in 1,788 mm
Revolutions: 899.56/mi 559.42/k

Difference

Choose a measurement system

  Imperial   Metric
Difference Percent
0.00 in 0.00%
0.00 in 0.00%
0.00 in 0.00%
0.00 in 0.00%
0.00 in 0.00%
0.00 in 0.00%
0.00/mi 0.00%
Speed Variance When your speedometer reads mph with the new tires, your vehicle will actually be traveling at 70.00 mph, which is 0.00% faster than the original tires.
Diameter Variance The overall diameter variance of the new tire is 0.00 inches, which is 0.00% different than the original.  You should never go beyond 3% of the original tire, otherwise you run the risk of brake failure.