Tire Size Calculator

How to use Tire Size Calculator tools?

  Follow these step-by-step instructions to get the information you need:

    1.Locate Your Current Tire Size:

        Check the sidewall of your current tires to find the size printed on them. It will look something like this: 275-50R20. This number includes the tire width, aspect ratio, and rim diameter.

    2.Input Your Current Tire Size:

         In the calculator, enter the following details:

            Width: The first number (e.g., 275).

            Aspect Ratio: The second number (e.g., 50).

            Rim Diameter: The last number (e.g., 20).

    3.Click “Tire Size Calculate”

        Once you've entered your tire size,click the button to calculate. This will process your input and display the recommended tire sizes.

What do the numbers in a tire size mean?

For example, in a tire size 275/50R20:

• 275 is the width of the tire in millimeters
• 50 is the aspect ratio (height of the tire's cross-section to its width)
• R means it's a radial tire
• 20 is the wheel diameter in inches