1997 Buick Park Avenue Owner's Manual - Page 318

Temperature -- A, B, C Wheel Alignment and Tire Balance The wheels on your vehicle were aligned and balanced carefully at the factoryto give you the longest tire life and best overall performance. Scheduled wheel alignment and wheel balancing not are needed. However, if you notice unusual wear or tire your vehicle pullingone way or the other, the alignment may need to be reset. If you notice your vehicle vibrating when driving on a smooth road, your wheels may need to be rebalanced. The temperature grades are A (the highest), B, and C , representing the tire'sresistance to the generation of heat and its ability to dissipate heat when tested under controlled conditions on a specified indoor laboratory test wheel. Sustained hightemperature can cause the material of the tire to degenerate and reduce tire life, and excessive temperature can lead to sudden tire failure. The grade C corresponds to a level of performance which all passenger car tires must meet under the Federal Motor Vehicle Safety Standard No. 109. Grades B and A represent higher levels of performance on the laboratory test wheel than the minimum required by law. Warning: The temperature grade for this tire is established for a tire that is properly inflated and not overloaded. Excessive speed, underinflation, or excessive loading, either separately or in combination, can cause heat buildup andpossible tire failure. Wheel Replacement Replace any wheel thatis bent, cracked, or badly rusted or corroded. If wheel nuts keep coming loose, the wheel, wheel bolts and wheel nuts should be replaced. the If wheel leaks air, replace it (except some aluminum wheels, which can sometimes be repaired). See your Buick dealer if any of theseconditions exist. Your dealer will know the kind of wheel you need.