1998 Buick Park Avenue Owner's Manual - Page 325

U~ffJrpxQna&y K&-&&qg The following infomation relates to the system developed by the United States National Highway Traffic Safety'Administration, which grades tires by treadwear, traction and temperature pedommce. (This applies only to vehicles sold in the 'United States.) The grades are molded on the sidewalls of most passenger cartires. The Uniform Tire Quality Grading system doesnot apply to deep tread, winter-type S ~ Q W tires, space-saver or temporary use spare tires, tires with nominal rim diameters of 10 to 12 inches (25 to 30 cm), or to some limited-production tires. IVhile the tires available on Generd Motors passenger cars and light trucks may vary with respect to these grades, they must also confom toFederal safety requirements and additional General Motors Tire Performance Criteria ( P C ) standards. m~ Q e