Tire treadwear ratings, also known as Uniform Tire Quality Grading (UTQG), were developed by the National Highway Traffic Safety Administration (NHTSA) and the U.S. Department of Transportation (DOT).

Dear Car Fix: I'm looking to get tires for my car and I'm so confused with all the numbers on the side of the tire. Can you tell me what the "A, B, C" means? -- P.F., Orchard Park Dear P.F.: I agree ...