Below are tips and information to help you learn how to read tire size and other tire markings commonly seen in the U.S.
Original Equipment Approval Code
All tires must have a DOT, Department of Transportation number which indicates the tire has passed all minimum DOT standards for sale in the U.S.
Uniform Tire Quality Grading (UTQG) Marking
The Department of Transportation requires each manufacturer to grade its tires under the Uniform Tire Quality Grade (UTQG) system which establishes ratings for treadwear, traction and temperature resistance. These tests are conducted independently by each manufacturer following government guidelines that provide a comparison between the manufacturers’ tested tire and a control tire.