How To Read Tire Size

How To Read Tire Size

While a car’s tires are designed to last a long time, there may come a point when one or more need to be replaced.

If that happens, you want to make sure the new tire is the same exact size as the other ones. Otherwise, you may have an unbalanced ride, which could compromise your safety on the roads of Jenkintown, Abington, Glenside, or Philadelphia.
It’s important to understand how to read tire size so that you know the new tire will match in proportion. We’ll go over how to do that below. Then, feel free to contact Faulkner Nissan Jenkintown if you have any questions.


The size of a tire is typically found on its sidewall. There, you’ll find a series of letters and numbers that represent different parts of the tire. To explain in further in detail, we’ll use the example P215/65R15 95H.


The first digit, “P,” represents the type of tire you have. In this case, you have a P-Metric tire, which is meant for passenger vehicles. You might even see “LT” in its place, which would indicate that the tire is for a light-duty truck.


The next three numbers, “215,” are for the tire width. The width is measured in millimeters and goes from sidewall to sidewall. So, for this tire, the width is 215 millimeters.


You then have the aspect ratio, which compares the tire’s cross-section height to its width. In this example, the tire’s section height is 65% of its width.


Next is the construction, which here is shown by the letter “R.” It means you have a Radial tire, where its layers run radially across.


After the “R” is “15,” which is for the wheel diameter. This is the size of the wheel measured from one end to the other and is shown in inches. It essentially tells you the size of the wheel that the tire is meant to fit. Here, this tire is designed for a wheel that’s 15 inches in diameter.


The last set of numbers, “95,” represents the load index. The load index tells you the maximum weight that a tire can support when properly inflated. It’s shown in a specific number, which then corresponds to a certain weight. With this tire having the number “95,” it means that it can support a maximum weight of 1,521 pounds.


TireThe very last digit on the tire sidewall is “H,” which is for the speed rating. This letter tells you the maximum speed a tire can safely sustain under the recommended load capacity. For this tire, you won’t want to drive faster than 130 MPH. Otherwise, the tire’s handling and stability may start to suffer.


Now that you know how to read tire size, you can get the right one for your automobile. To schedule a tire replacement near Jenkintown, Abington, Glenside, or Philadelphia, contact Faulkner Nissan Jenkintown today!