Breaking Down How to Read Tire

Tire numbers look confusing, but they aren't at all. You can easy break them into manageable chunks as follows:

  • Tire Type: The letter at the beginning of the tire size line can either be P for passenger-grade or LT for light truck-grade. If there's no letter, then you have a Euro-metric tire.
  • Tire Width: The next three digits measure the width of the tire in millimeters.
  • Aspect Ratio: While you might think of aspect ratio as having something to do with TV, the next two digits after the slash tell you a percentage of the ratio between the height and width of the tire.
  • Construction: Generally, you'll find a capital letter R next to indicate you have a radial tire.
  • Wheel Diameter: The last digits read the size of your tire from end to end.

Some commercial tires will have additional size metrics that indicate load index or maximum speed rating. If you're confused, then head over to our service center here at Lodi Toyota in Lodi, CA and we'll get you the right tires you need.

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