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).

Few car maintenance tasks are as crucial (or as often overlooked) as tire tread depth. It's a major part of determining how safe, effective, and long-lasting your tires are, and yet it's rarely ever ...