what do the numbers on a tire mean

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The numbers and letters on a tire meantire type, width, height to width ratio, construction type, diameter, load index, and speed rating. Some tires also list the severe weather rating. Are All Weather Tires Good for Snow?

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  • What do the letters and numbers on a tire size mean?

  • Those letters and numbers you see are important indications of what you should look for when buying new tires. Here鈥檚 a quick look at tire sizes and ratings and what all those numbers mean: A common tire size is P225/65R17. Confusing, right? Let鈥檚 break this down a bit more: Tire type: Your tire will start with a letter explaining the tire type.

  • How are tire size specifications determined?

  • Tire size specifications are outlined by the numbers and letters found on the sidewall of tires. It is important that we understand tire geometry and be informed of the parameters that govern their performance. Tire sizes are defined by specifications such as the type, width, aspect ratio,…

  • What does the size of a tire tread mean?

  • Tire Size Meanings. It鈥檚 the height of the sidewall measured from wheel rim to top of the tread, expressed as a percentage of tire width. In other words, it鈥檚 sidewall height divided by tire width. In this example, the aspect ratio is 65, meaning the sidewall is 65 percent as high as the tire is wide.

  • What do the numbers on a tire sidewall mean?

  • There’s a massive amount of information branded on the sidewall of every tire … but it’s written in code. The tire size is just one small piece of this code. The tire size P225/45R17 91V may not mean much to the average person, but to tire geeks like us it speaks volumes.