2000 Ford Focus Owner's Manual - Page 208

Maintenance and care INFORMATION ABOUT TIRE QUALITY GRADES New vehicles are fitted with tires that have their Tire Quality Grade (described below) molded into the tire's sidewall. These Tire Quality Grades are determined by standards that the United States Department of Transportation has set. Tire Quality Grades apply to new pneumatic tires for use on passenger cars. They do not apply to deep tread, winter type snow tires, space saver or temporary use spare tires, tires with nominal rim diameters of 10 to 12 inches or limited production tires as defined in Title 49 Code of Federal Regulation Part 575.104(c)(2). U.S. Department of Transportation Tire quality grades: The U.S. Department of Transportation requires Ford to give you the following information about tire grades exactly as the government has written it. 208