1998 Oldsmobile Cutlass Owner's Manual - Page 260

Temperature -- A, B, C Wheel Alig1:::::Bt and Tire Balance The wheels on your vehicle were aligned and balanced life carefully atthe factory to give you the longest tire and best overall performance. Scheduled wheel alignment and wheel balancing are not needed. However, if you notice unusualtire wear or your vehicle pulling one or the other, the alignment way If may need to be reset. 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's resistance the generation of to heat andits ability to dissipate heat when tested under controlled conditions on a specified indoor laboratory test wheel. Sustained high temperature can cause the tire material of the tire to degenerate and reduce life, and excessive temperature can lead to sudden tire failure. of The grade C corresponds to a level performance l which a l passenger cartires must meet underthe No. Federal Motor Vehicle Safety Standard 109. Grades B and A represent higher levelsof performance on the laboratory test wheel than minimum required by law. the Wheel Replacement Replace any wheel that is bent, cracked, or badly rusted or corroded. If wheel nuts keep coming loose, the wheel, If the wheel bolts and wheel nuts should be replaced. wheel leaksair,replace it (except some aluminum wheels, which can sometimes be repaired). your See retailer if any of these conditions exist. Your retailer will know the kind wheel you need. of Warning: The temperature gradefor this tireis is established for a tire that properly inflated and not overloaded. Excessive speed, underinflation, or excessive loading,either separately orin combination, can cause heat buildup and possible tire failure. 6-40