Every tire comes with a speed rating which indicates the maximum speed at which the tire will perform to the manufacturer’s specifications. A partial listing of speed ratings is listed below:
We hope the following information will help you understand tire ratings and give you the ability to make an educated decision about which tires are right for your vehicle.
Every tire comes with a Universal Tire Quality Grade (UTQG) rating. This system rates tires in three categories – tread wear, traction, and temperature. By using this system, car owners can form a qualitative performance comparison between different brands and models of the same tire size.
How It Works:
- Tread wear Rating: As a general rule, the higher the tread wear rating, the longer the tread life you can expect from that tire.
- Traction Rating: This rating will give you a relative idea of the tire’s traction performance in wet and slick conditions. The highest grade is AA and the lowest grade is C.
- Temperature Rating: This rating refers to the ability of the tire to perform at its peak in both extreme hot or extreme cold conditions. The highest rating is A and the lowest is C.
In order to replace your tires, you will need to know the size of the tires on your vehicle. The size of tires that originally came on your vehicle will be posted on the information label on the inside of the driver’s side door. The actual size of the tires currently on your vehicle will be marked on the tire sidewall and it will look something like: P225/60R16. Here is an explanation of what those markings mean:
The First Letter:
- The tire size will start with a “P” for Passenger rated tire, or “LT” which indicates it is a Light Truck tire.
The First Set of Numbers:
- The first three numbers (i.e. 225) are a measurement in millimeters of the width of the tire.
The Second Set of Numbers:
- The sidewall height is identified by the second set of numbers. It represents a percentage compared to the tire width. For example, a rating of 60 means that the sidewall measurement is equal to 60% of the tire width.
The Second Letter:
- The “R” indicates the tire has radial construction. The vast majority of all tires on the market today are radials.