Tire width always refers to the measurement from one sidewall to another. The first number to appear in your tire size information is the width, in millimeters, of the correct tires for your vehicle: P225/70R16 91S. It's only intended for use on trailer axles.
If you see "ST," that means "special trailer." A special trailer tire is never installed on the drive or steer wheels. Similarly, "T" stands for "temporary" and is for your spare tire. Light truck tires are designed to be used on vehicles capable of carrying heavy cargo or pulling trailers. If you see "LT" instead of "P," it's because you need "light truck" tires – "LT" is short for "LT-metric," which is a designation by the Tire and Rim Association for a "light truck" type tire. A "P" signifies the tire was designed to primarily be used on passenger vehicles, which can include cars, minivans, SUV's and other light-duty pickup trucks. The "P" is short for "P-metric," which is a designation by the Tire and Rim Association for a "passenger car" tire type.
Whatsize tire goes on a 25 model tt truck front how to#
Let's break down how to read car tire size.įor most vehicles, you'll see the letter "P" before the number sequence begins: P225/70R16 91S. Don't worry if it looks confusing at first - every letter and number has a straightforward meaning. However, no matter where you find your tire size, you will have to decipher a sequence of numbers and letters. You can also find tire size data on the sidewall of your current tires (assuming they're the proper size). The best place to start looking is the owner's manual.ĭon't worry if you can't locate the manual you may also find a tire fit guide in these locations: No matter what vehicle you drive, finding the manufacturer-recommended tire size should be easy. Knowing how to read car tire sizes also means understanding terms like load index and speed rating that affect your vehicle's overall capabilities.
While actual, physical measurements like width and diameter are factors in finding the right tire size, there are additional details to consider.
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