2009 Volvo XC90 Owner's Manual - Page 142

06 Starting and driving All Wheel Drive (option) All Wheel Drive (AWD) - general information Your Volvo can be equipped with an electronically controlled All Wheel Drive system (option), which means that power is distributed automatically between the front and rear wheels. Under normal driving conditions, most of the engine's power is directed to the front wheels. However, if there is any tendency for the front wheels to spin, an electronically controlled coupling distributes power to the wheels that have the best traction. Temporary Spare The temporary spare tire is for temporary, lowspeed, short-distance use only. Replace it with a full-sized tire as soon as possible. Do not drive on the temporary spare at speeds above 50 m.p.h. (80 km/h). NOTE Never install snow chains on a temporary spare. Tire dimensions Volvo recommends that you always drive on tires of the same brand, size, construction (radial), tread pattern, load-, speed-, traction-, temperature-, and treadwear rating. Never drive on mixed tires, except for brief periods when the temporary spare tire is in use. Always use properly inflated tires of correct dimensions. Tire size and inflation pressures are shown on the tire inflation pressure placards, located on the driver's side B-pillar (the structural member at the side of the vehicle, at the rear of the driver's door opening), or on the inside of the fuel filler door on Canadian models. 06 142