Tire Sidewall Codes: Everything You Need to Know

Understanding the Numbers on Your Tire’s Sidewall: A Guide to Choosing the Right Tire

Goodman South Madison Library offers community-based language learning to to help improve language learning in the Madison community. Because grasping a new language can be difficult. And some languages are more opaque than others; like the automotive industry’s “language” found on the sidewall of your tire. But they are there for a reason. And understand what these codes mean help when you need to find the right tire for your car or truck.

When shopping for new tires, it can be overwhelming to decipher all the numbers and letters on the sidewall of each tire. Yet, these markings hold key information that can help you select the right tire for your vehicle. So, in this blog the experts at Meineke in Madison offer this quick breakdown of what those numbers on your tire’s sidewall mean and how they guide your purchase.

1. Tire Width (ie: 225)

The first number you’ll find on your tire’s sidewall represents the width of the tire in millimeters, measured from sidewall to sidewall. And it’s a good thing to know that a wider tire typically offers better traction, especially in dry conditions.

2. Aspect Ratio (ie: 60)

This number indicates the ratio of the tire’s height to its width. For example, a 60 aspect ratio means the height is 60% of the tire’s width. And a higher ratio usually means a taller sidewall, which can improve ride comfort. But it may sacrifice handling performance.

3. Construction Type (ie: R)

The letter “R” stands for “radial,” which is the most common tire construction type. And radial tires have layers of fabric cords running at a 90-degree angle to the direction of travel, providing durability and a smooth ride.

4. Rim Diameter (ie: 16)

This number represents the diameter of the wheel the tire is designed to fit (measured in inches). And it ensures compatibility with your vehicle’s rims.

5. Load Index (ie: 94)

The load index indicates the maximum weight the tire can carry. And, a higher number means the tire can support more weight. So, always match the load index to your vehicle’s requirements for safety.

6. Speed Rating (ie: H)

The speed rating tells you the maximum speed the tire is designed to safely handle. For example, “H” means the tire can handle speeds up to 130 mph. So, be sure to choose a speed rating that matches your driving habits.

7. Additional Markings:

Look for other markings like “M+S” (Mud and Snow), which indicates the tire is suitable for light off-road conditions. Or a “DOT” marking, which certifies the tire for use in the U.S.

Meineke Can Help You Find the Perfect Tire to Meet the Needs of Your Vehicle and Your Wallet

By understanding these numbers, you can make an informed decision when choosing tires. But it’s also a good idea to consult your tire experts at Meineke on Milwaukee Street to ensure you select the right tires for optimal performance. So, if you are considering new tires, call Meineke today.

If the Meineke on Milwaukee Street in Madison is not a convenient location, check out these other locally-owned Meineke locations:

MEINEKE SHEBOYGAN #2989
3667 S Taylor Drive
Sheboygan, WI 53081
Call (920) 783-6013

MEINEKE MADISON #355
4008 Milwaukee Street
Madison, WI 53714
Call (844) 374-1281

MEINEKE MADISON #1649
437 Commerce Drive
Madison, WI 53719
Call (833) 814-2314

MEINEKE SUN PRAIRIE #2057
2518 Ironwood Drive
Sun Prairie, WI 53590
Call (844) 687-9785

MEINEKE APPLETON #2136
1708 W. Wisconsin Avenue
Appleton, WI 54914
Call (866) 532-0443

MEINEKE COTTAGE GROVE #2474
222 W. Cottage Grove Road
Cottage Grove, WI 53527
Call (844) 453-2300

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