2001 Oldsmobile Intrigue Owner's Manual - Page 271

Uniform Tire Quality Grading The followinginformation relates to the system developed by the United States National Highway Traffic Safety Administration, which grades tires by Mixing tires could cause to lose control while you treadwear, traction and temperature performance. (This driving. If you mix tires different sizes or types of (radial and bias-belted tires), the vehicle may not applies only to vehicles sold in the United States.) The grades aremolded on the sidewalls of most passenger handle properly, andyou could have a crash. car tires. The Uniform Tire Quality Grading system does Using tires of different sizes may also cause not apply to deep tread, winter-type snow tires, damage to your vehicle. Be sure to use the same space-saver or temporary use spare tires, tires with size and type tires on wheels. all nominal rim diameters of 10 to 12 inches (25 to 30 cm), or to some limited-production tires. It's all right to drive with your compact spare, though. It was developed for use on yourvehicle. While the tires available on General Motors passenger cars and light trucks may vary with respect to these grades, they must also conform to Federal safety requirements and additional General Motors Tire Performance Criteria (TPC) standards. I A CAUTION: If you use bias-ply tires on your vehicle, the wheel rim flanges could develop cracks after many milesof driving. A tire and/or wheel could fail suddenly, causing crash. Use only radial-ply a tires with the wheels on your vehicle. 6-43