How to Read Tire Sizes


Find Tire Sizes

Get a look at your tire sidewall and you’ll see information molded into the rubber, in the form of raised letters and numbers. We’d like to explain to you what that information means, so let’s break it down:

  • Load Index – The load index is a reflection of the maximum weight that is safe for a tire to carry. The load index numbers range from 0 to 279; passenger car tires are usually in the 75-105 range. When it’s time to replace your tires you’ll want to pay close attention to those numbers.
  • Speed Rating – Speed rating designations are assigned by the U.S. government, and are an indicator of minimum standards for accelerating to and holding a certain specific speed. The higher the speed rating number on a tire, the better a v ...[more]

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Learn How to Read Tire Numbers


We hear questions all the time about what specific tire numbers mean that are shown on tires. Information on speed rating, tire width, load rating and more are quite common on every tire you look at. This information is shown on the sidewall and is easy to read, but more importantly, needs to be understood. Feel free to watch this video which demonstrates simply what these numbers represent. You'll become a tire professor in no time!

The graphic to the right has four numbers and two letters, and all of them are important. Here's each number and letter in order, as well as what it represents. A more detailed explanation of each characteristic is below.

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