2008 Mazda RX-8 Owner's Manual - Page 333

Customer Information and Reporting Safety Defects Uniform Tire Quality Grading System (UTQGS) WARNING Keep your vehicle's tires properly inflated and not overloaded: Driving with improperly inflated or overloaded tires is dangerous. Excessive speed, underinflation, or excessive loading, either separately or in combination, can cause heat buildup and possible tire failure. The temperature grade for this tire is established for a tire that is properly inflated and not overloaded. These grades will be added to the sidewalls of passenger vehicle tires over the next several years according to a schedule established by the NHTSA and the tire manufacturers. The grade of tires available as standard or optional equipment on Mazda vehicles may vary with respect to grade. ALL PASSENGER VEHICLE TIRES MUST CONFORM TO THESE GRADES AND TO ALL OTHER FEDERAL TIRE-SAFETY REQUIREMENTS. qUniform Tire Quality Grading Quality grades can be found where applicable on the tire sidewall between tread shoulder and maximum section width. For example: Treadwear 200 Traction AA Temperature A UTQGS MARK (example) TREADWEAR 200 TRACTION AA TEMPERATURE A 9-17