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Help Center - How To Size Your Tires

How do I know what size my tire is?

For the quickest and easiest way to get your tire size and know that it will work for your vehicle is going to your current tires. On the sidewall of every tire there is a series of letters and numbers that make up the size of your tire. We advise getting the size from the tires currently on your vehicle to ensure you are shopping for the correct size. In many cases, such as for used vehicles, the wheels may not always by the stock part so the door panel which gives you the OEM size for the vehicle might possibly differ than what is currently on the vehicle.

TYPE

Commonly you may find the letter "P" at the beginning of the size information. For example, the letter "P" denotes that the tire is for a "Passenger Vehicle" meeting the standards for use in the United States, intended for Passenger vehicles.

WIDTH

This is the the tire width measured in millimeters from sidewall to sidewall. In this example, the tire is 225 millimeters wide from sidewall to sidewall.

ASPECT RATIO

This is the ratio of the height of the tire's cross-section to its width. The two-digit number after the slash mark in a tire size is the aspect ratio. For example, this P225/60R15 tire, the 60 denotes the height of the sidewall is 60% of the width of the tire.

CONSTRUCTION

The letter "R", common in most tires denotes that this tire's construction is "RADIAL" - a popular, reliable and very common construction type.

DIAMETER

Your tire's diameter is the size of the wheel it's intended to fit on, measured from one edge to the other. A size P225/60R15 tire is designed for a wheel with a 15" diameter.



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