2008 Volvo S80 Owner's Manual - Page 242

WARNING Current legislation prohibits the use of the "Temporary Spare" tire other than as a temporary replacement for a punctured tire. It must be replaced as soon as possible by a standard tire. Road holding and handling may be affected with the "Temporary Spare" in use. Do not exceed 50 mph (80 km/h). CAUTION The vehicle must not be driven with wheels of different dimensions or with a spare tire other than the one that came with the vehicle. The use of different size wheels can seriously damage your car's transmission. 252 06 Maintenance and specifications Wheels and tires Summer and winter tires When switching between summer and winter tires, mark the tires to indicate where they were mounted on the vehicle, e.g. LF = left front, RR = right rear. Tires with tread designed to roll in only one direction are marked with an arrow on the sidewall. Incorrectly mounted tires impair the car's braking properties and ability to force aside rain, snow and slush. The tires with the most tread should always be at the rear (to reduce the risk of skidding). Contact a Volvo workshop if you are unsure about the tread depth. Tire rotation Your vehicle has no recommended tire rotation. The following information is intended to help you understand why. Tread set As a tire ages and the rubber cures, front and rear tires set at different angles. Therefore, if tires are rotated, the tread will eventually set at an angle that is a compromise. Even if ride, handling, and road noise may still seem acceptable, they may not be optimal. Further, tires that are rotated, but not on a regular basis, may actually cause more tire noise, faster tire wear, and unpleasant changes in steering feel and vehicle handling. A tire that can fully adapt to its position will provide better steering feel, lower tire noise, and better fuel economy. Braking stability performance Your vehicle is driven mainly by the front tires, which will wear faster. This can be beneficial. Having more tread on the rear tires will help reduce oversteer. Oversteer is when a vehicle wants to keep turning because of momentum and dynamic forces on its suspension.