How do I read the markings on the sidewall of pneumatic tires?

Jan 22, 2026

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Hey there! As a supplier of pneumatic tires, I've seen a lot of folks scratching their heads when it comes to reading the markings on the sidewall of these tires. It can seem like a bunch of random letters and numbers at first glance, but trust me, once you know what they mean, it's like unlocking a secret code that tells you everything you need to know about your tire.

Let's start with the basics. The sidewall markings on a pneumatic tire are there for a reason. They provide crucial information about the tire's size, load capacity, speed rating, and more. This info is super important for making sure you're using the right tire for your vehicle and driving conditions.

First up, let's talk about the tire size. This is usually the most prominent marking on the sidewall. It's a series of numbers and letters that look something like this: P215/65R15. Here's what each part means:

  • The "P" stands for "passenger car." If you see an "LT," that means it's a light truck tire. There are also other codes for different types of vehicles, like "T" for temporary spare tires.
  • The "215" is the width of the tire in millimeters, measured from sidewall to sidewall.
  • The "65" is the aspect ratio. This is the ratio of the tire's height to its width. In this case, the height of the tire is 65% of its width.
  • The "R" stands for "radial," which is the most common type of tire construction these days.
  • The "15" is the diameter of the wheel in inches that the tire is designed to fit.

Next, we have the load index and speed rating. These are usually printed together, like "95H." The load index (in this case, "95") tells you the maximum weight that the tire can carry. You can look up the specific weight in a load index chart. The speed rating ("H") indicates the maximum speed that the tire is designed to handle safely. Here are some common speed ratings and their corresponding speeds:

  • "S": 112 mph
  • "T": 118 mph
  • "H": 130 mph
  • "V": 149 mph
  • "W": 168 mph
  • "Y": 186 mph

There are also other markings on the sidewall that can give you more information about the tire. For example, you might see a "M+S" marking, which stands for "mud and snow." This means that the tire has been designed to perform well in these types of conditions. Another common marking is the "DOT" number. This is a code that indicates that the tire meets the safety standards set by the Department of Transportation.

Now, let me tell you about some of the tires we offer as a pneumatic tire supplier. We have the General Tire Super All Grip, which is a great all-purpose tire that offers excellent traction in a variety of conditions. Whether you're driving on wet or dry roads, this tire will keep you safe and comfortable.

We also have the Steel Wire Tire. This tire is built with steel wire reinforcement, which makes it more durable and resistant to punctures. It's a great choice for heavy-duty vehicles and off-road use.

heavy duty snow tiresSteel Wire Tire

And if you're in the market for a tire for your excavator, we have the Rubber Tire for Excavator. This tire is specifically designed to handle the tough conditions of construction sites and other heavy-duty applications.

Reading the markings on the sidewall of pneumatic tires might seem complicated at first, but once you understand what each part means, it's not so bad. It's important to pay attention to these markings to make sure you're using the right tire for your vehicle and driving conditions.

If you're interested in learning more about our pneumatic tires or have any questions about the sidewall markings, don't hesitate to reach out to us for a chat. We're always here to help you find the perfect tire for your needs.

References

  • Tire Industry Association. "Tire Sidewall Markings."
  • National Highway Traffic Safety Administration. "Tire Safety Information."