Safercar.gov: Tires: Consumer safety information related to automobile tires, covering topics such as understanding and checking tire pressure, tire maintenance (such as rotation and repair), tire ratings (treadwear, traction, and temperature), tire labeling for passenger vehicles and light trucks, and tire defects. From the National Highway Traffic Safety Association (NHTSA) of the U.S. Department of Transportation. [annotation from LII.org]