How to Read Tire Sizes

When you know the basics of what your vehicle and its parts require, it can be a real advantage to you. Tires are an example of information you should understand the basics of. The abbreviations on the side may require a little explanation, but with practice, you’ll find they’re easy to remember.

If you’re looking for a passenger tire, you may find the series begins with a “P,” which indicates it’s tested for a passenger vehicle. Following the letter, there’s a three-digit number, and that represents the tire’s width in mm. After that number, you’ll see a slash and a two-digit number. This number is the ratio of the tire’s height to its width. If it’s a 55, for instance, then the height is 55% of the tire’s width. Another letter comes after this number. It may be an “R,” and that tells you what type of tire it is. In this instance, it’s a radial. A final two-digit number represents the wheel’s diameter. A 16 means your wheel requires a 16-inch tire.

Don’t hesitate to stop in to our service center at Ford of Greenfield with questions the next time you’re in the Greenfield area.


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