How To Read Tire Size

There are two ways that tire manufacturers display tire size, inches and metric. How to read tire size in inches is very straight forward. Example A : 33X12.50R15 The first number is your overall diameter of the tire.

Once you find the series of numbers on your tire’s sidewall, use the diagram above and the list below to find the meaning of each number. Metric, or tire type, defines the proper use of the tire.

The tire size branded on the sidewall provides a significant amount of information about the tire's intended purpose, dimensions, load capacity and high temperature/high speed durability. Our primary example will be based on variations of the 225/50R16 size, although other sizes will appear...

The letter "P" at the beginning of the "Tire Size" tells us the tire is a P-Metric tire, referring to tires made to certain standards within the United States, intended for Passenger vehicles.

Learn more about "How To Read A Tire Sidewall" and get the latest news about tires and more at Continental.

Using our Tire Size Calculator, you can get exact measurements for your current tire size. If you are considering replacing your tires with a different sized tire, you can conduct a size comparison, which can help you determine what alternate tire sizes will work on your vehicle.

Automobile tires are described by an alphanumeric tire code (in American English and Canadian English) or tyre code (in British English, Australian English and others), which is generally molded (or moulded) into the sidewall of the tire. This code specifies the dimensions of the tire, and some of its key limitations, such as load-bearing ability, and maximum speed.

After the size code, you will find characters representing the tire’s load index and speed rating: The load index is a number explicitly indicating how much weight your tire can carry at different inflations. You can find this number in the load index table, where it refers to your tire’s carrying capacity in pounds.

Tire sizing can be confusing, use our Tire Size Calculator to find tires that fit your vehicle and buy online at Goodyear.com.

1010tires.com Tire Size calculator. Use our tire calculator to compare tire sizes based on tire diameter, radius, sidewall height, circumference, revs per mile and speedometer difference.

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  • How To Read Tire Sizes Goodyear Auto Service

    Is the width of the tire measured in millimeters from sidewall to sidewall. The first three digit number in the tire size refers to the tire width. For instance, in a size P215 65 R15 tire, the width is 215 millimeters..

  • How To Read Tire Size

    How to read metric sizes P255 60R17 102V Tire Class P Tire tire class of this tire size is ‘P’ which means it is a passenger car tire. Section Width 255 The width of this tire size is 255mm wide. Aspect Ratio 60 The aspect ratio on this tire size is 60. Tire Construction R The tire .

  • How To Read Tire Sizes It Still Runs

    How to Read Tire Sizes. by Andrew Chen. A tire’s dimensions can be determined by reading the markings on the sidewall. An example tire size is 245 45R18, which tells us the width, sidewall height, internal construction and matching wheel diameter. Let’s take a closer look at the size stamp on this Falken ZIEX ZE950 all season tire..

  • Tire Tech Information Tire Size Guide

    The measurement is the tire’s section height, and also referred to as the tire’s series, profile or aspect ratio. The higher the number, the taller the sidewall the lower the number, the lower the sidewall. We know that this tire size’s section width is 225mm and that its section height is 50 of 225mm..