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Tire Size Calculator

Tire Size: / R

Tire Height (Diameter)	0 in / 0 mm
Wheel Size	0 in / 0 mm
Sidewall Height	0 in / 0 mm
Tire Width	0 in / 0 mm
Tire Circumference	0 in / 0 mm
Revolutions per Mile	0
Revolutions per Kilometer	0

Understanding Tire Sizes

Tire sizes are represented by a code that contains three main numbers:

Width

The first number represents the tire's width in millimeters from sidewall to sidewall.

Aspect Ratio

The second number is the aspect ratio, representing the tire's height as a percentage of its width.

Wheel Diameter

The last number indicates the wheel diameter in inches.

Example

A tire size of 265/70R17 means: 265mm wide, 70% aspect ratio, fits 17-inch wheel.

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