2005 Saab 9-3 Owner's Manual - Page 239

Car care The wheels and tires have been carefully matched to the characteristics of the car and play a key role in its outstanding roadholding and handling. Do not take it for granted that a wheel/tire combination will work in the best possible way, just because it can be fitted to the car. To ensure that the speedometer is as accurate as possible it should be reprogrammed if wheels of a different dimension are fitted. Contact a Saab dealer. Because of front wheel drive, the front tires tend to wear faster than the rear ones. New tires should always be fitted in pairs, so that tires on the same axle have the same amount of tread. Store wheels lying flat or hanging - never standing upright. 237 NOTICE Always consult your Saab dealer before changing the car's wheels or tires on your Saab. Wide wheels and tires with side walls that are too low can: • be damaged in potholes, etc. • cause springs, shock absorbers and wheel bearings and body mountings to be overloaded. • affect the function of the Electronic Stability Program (ESP). The speed and load limits of the tires must not be exceeded; see page 242. Wheels larger than 17" must not be fitted on the Saab 9-3 for reasons above. The permissible offset is 1.61 inch (41 mm). WARNING Mixing tires could cause you to lose control while driving. If you mix tires of different sizes or types (radial and biasbelted 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 to use the same size and type tires on all wheels. It's all right to drive with your compact spare temporarily, it was developed for use on your vehicle. See "Compact spare" on page 246. WARNING If you use bias-ply tires on your vehicle, the wheel rim flanges could develop cracks after many miles of driving. A tire and/or wheel could fail suddenly, causing a crash. Use only radial-ply tires with the wheels on your vehicle.