1997 Oldsmobile Aurora Owner's Manual - Page 300

The tire has a puncture, cut or other damage that can't be repaired well because of the size orlocation of the damage. A CAUTION: Mixing tires could cause to lose control while you driving. If you mix tires of different sizes or types (radial andbias-belted tires), the vehicle may not handle properly, and you could have a crash. Using tires of different sizes may also cause damage to your vehicle. Be sure touse the same on size and type tires all wheels. It's all right to drive with your compact spare, though. It wasdeveloped for use on your vehicle. Buying New Tires To find out what kind and size of tires you need, look at the Tire-Loading Information label. The tires installed on your vehicle when it was new had a Tire Performance Criteria Specification (TPC Spec) number on each tire's sidewall. When you get new tires, get oneswith that same TPC Specnumber. That way your vehicle will continue to have tires that are designed to give proper endurance, handling, speed rating, traction, ride and other things during normal service on your vehicle. If your tires have an all-season tread design, the TPC number will be followed by an "MS" (for mud and snow). If you ever replaceyour tires with those not having a TPC Spec number, make sure they are the same size, load range, speed rating and construction type (bias, bias-belted or radial) as your original tires. 6-48