How to Read an ATV Tire Size

1. Locate your tire size on the sidewall of the tire.
2. The first number represents the overall height when mounted and inflated to the proper air pressure.
3. The second number represents the overall width when mounted and inflated to proper air pressure.
4. The third number represents the diameter of the wheel this tire will mount on.

Traditional ATV/UTV Tire Size

How to Read a Metric ATV/UTV Tire Size

Metric ATV Conversion Example: Tire Size – 205/80R12

How to Convert a Metric ATV Tire Size

1. Locate your tire size on the sidewall of the tire.
2. The first number represents the overall
   WIDTH when mounted and inflated to the proper air pressure but it is measured in millimeters.

Divide this number by 25.4 to convert to inches. This will become the second number for a traditional ATV tire size.

1. The second number represents the aspect ratio to the width of the tire (a percentage) HEIGHT when mounted and inflated to proper air pressure but is measured in millimeters.

To convert this number to a traditional (inches) tire size, you multiple this number by 2 and divide by 25.4. Then add that number to the wheel diameter.

This number now becomes the FIRST number in a traditional size

1. The “R” represents that the tire uses radial construction.
2. The third number represents the diameter of the wheel this tire will mount on.