Tires with higher aspect ratios also mean that the passenger vehicles have smoother rides. Bigger tire ratio indicates bigger and taller tire sidewall. The number 45 means that the height is equal to 45 percent of the width. So if the tire markings indicate P225/45R17 91V, it means that the height of the sidewall is 225 multiplied by 0.55 or 101.25 millimeters. The next two numbers after the width of the tire show the sidewall height in the percentage of the tire’s width. Cars that are high-performance use tires with higher section width than other vehicles. So for this marking: P225/45R17 91V, the tire intended for a passenger vehicle is 225 millimeters wide. The tire size first number shows the width of the tire as measured at its widest part in millimeters, from one sidewall to the other. Tire companies are also proficient in determining which rubber is right for you. The recommended tire size and inflation pressure for the vehicle are detailed in the owner’s manual, however. The important thing here is that P-Metric tires have different load capacities compared to Euro-metric tires. If there is no letter before the set of numbers, the tire indicates a Euro-metric tire. The letter C means the tires are commercial tires used for delivery trucks or vans that can carry heavy loads. C, on the other hand, can be found in the middle part of Euro-metric tire sizes. What do ST and C mean? The ST combination on tires indicates that the tires are special trailer tires that are used on utility trailers, cars or boats.

They should be replaced once the vehicle is repaired. These tires are used only for a short period, usually during an emergency. How about the letter T? If you see a combination of tire size beginning in T, it indicates that the tire is a temporary spare.

This type of vehicle includes full-sized vans, SUVs, and some of the larger pickup trucks with a capacity of 3/4 ton to 1-ton. LT, on the other hand, indicates that the tires are made for light trucks, which require higher inflation pressure than that of P tires. Passenger vehicles include cars, light-duty pickup trucks, and minivans. P means the tire is used for a passenger vehicle. What do LT and P mean on tires? The first letter on a tire shows the tire’s class. Let’s start with the letters at the beginning of the combinations. Let’s get to learn more about these markings. You can also learn about the production date of the tires, as well as maximum inflation rating, the Uniform Tire Quality Grading (UTQG), and its temperature and traction ratings. The height of its sidewall also called aspect ratio.These numbers show a lot of information, including the six things that you need to know about the markings on the tires: Under the brand name we usually see the combination of letters and numbers starts with letters, like the following examples: The first letter or letters on the markings will indicate the type of the tire. The easiest thing to point out in your tire’s sidewall would be the brand of the tire you are using. You need to get the proper size of the tires and make sure that all tires are marked the same. Understanding the letters and numbers on your tires is important because it will help you determine which type of tire to purchase as a replacement. It’s like a piece of clothing, which you need to make sure fits perfectly. Tires make a lot of difference when you find yourself in a difficult situation where you need to steer clear away from danger or from harming others. These numbers and letters tell a lot of information about the tires’ purpose, its dimensions, the load capacity it could hold, and its durability in high temperature and high speed. What do tire size numbers mean? And what do these letters on my tires mean? If you have noticed, aside from the brand of your tires there are other markings on it, particularly letters and numbers. 6 Things You Need to Learn about the Numbers and Letters on Your Tires Image source: Īside from your car’s fuel, the right size of the wheels also plays a key role in keeping your vehicle in tip-top shape.

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