What Do Tire Numbers Mean?

Have you ever wondered about the combination of numbers and letters on the sidewall of your tires? If you’ve found yourself checking your tires or shopping for new ones in Orland Park, you might have asked yourself, “What do tire numbers mean?” These alphanumeric codes actually hold vital information about the tire’s size, type, and performance characteristics. Whether you need to purchase new tires or simply want to understand the numbers on your tires, let the The Garage at Bettenhausen service team provide you with the knowledge you seek. Explore our service tips below to answer the question, “What do the numbers on tires mean?”!

Understanding the Tire Number Meaning

Tire codes consist of a series of letters and numbers that convey important details to you or your trusted Tinley Park service center. These details include tire size, load index, speed rating, and tire type, all of which contribute to optimal performance. Let’s break down an example code to shed light on its components:

Example: P215/65R15 95H

Although it may appear perplexing, each section of the code carries significant information to accurately identify the tire type. Unlock the tire number meaning below.

Decoding the “P”

The letter “P” stands for “P-Metric tire,” indicating its use for passenger vehicles. In case your tires display “LT,” it signifies “light truck” tires designed for lightweight pickup trucks. If there’s no preceding letter, you’re dealing with a European style or Euro-Metric tire, which has different load capacities.

Decoding the “215”

Following the “P” is the number “215,” representing the tire width in millimeters from one sidewall to the other. In our example, the tire width measures 215 millimeters.

Decoding the “65”

After the forward slash, you encounter the aspect ratio code denoted by “65.” The aspect ratio reflects the tire’s height as a percentage of its width. In this case, the tire has an aspect ratio where its height is 65% of the tire’s width. Remember, a higher aspect ratio means larger sidewalls.

Decoding the “R”

Next in the tire number meaning is the letter “R” which indicates the tire’s construction, with “R” denoting a radial tire.

Decoding the “15”

The number “15” signifies the wheel size, representing the diameter of the wheel in inches. It informs us about the appropriate tire fitment for a 15-inch wheel.

Decoding the “95H”

Lastly, at the end of the code, we find “95H,” which refers to the tire’s load index and speed rating. The load index (“95” in this example) indicates the maximum weight the tire can support when properly inflated. For passenger vehicles, load index values typically range from 75 to 105. The letter “H” represents the speed rating, signifying the tire’s safe maximum speed based on its load capacity. Speed ratings are ranked from A to Z, and in our case, an “H” rated tire can reach a maximum speed of 130 mph.

How to Properly Check Tire Pressure

Irrespective of your car’s tire size, maintaining proper tire pressure is essential for their longevity and performance on your commutes from Oak Forest to Frankfort. Checking your vehicle’s tire pressure is quick and easy, thanks to Tire Pressure Monitoring Systems (TPMS) found in most new vehicles.

If your tires are over- or under-inflated, the TPMS will notify you. You can conveniently visit a nearby gas station to add or release air as needed, or our expert technicians at The Garage at Bettenhausen can assist you during your service visit.

Trust The Garage at Bettenhausen for All Your Maintenance Needs

Now that you can answer the question, “What do tire numbers mean?” you’re in great shape to care for your vehicle. When it comes to new tires, brakes, or regular oil changes, The Garage at Bettenhausen is your go-to solution for all maintenance and parts requirements. Schedule an appointment in Tinley Park by completing our secure service form. Feel free to reach out to us online if you have any further questions.