2011 Subaru Outback Owner's Manual - Page 389

11-38 Maintenance and service & Wheel balance Each wheel was correctly balanced when your vehicle was new, but the wheels will become unbalanced as the tires become worn during use. Wheel imbalance causes the steering wheel to vibrate slightly at certain vehicle speeds and detracts from the vehicle's straight-line stability. It can also cause steering and suspension system problems and abnormal tire wear. If you suspect that the wheels are not correctly balanced, have them checked and adjusted by your SUBARU dealer. Also have them adjusted after tire repairs and after tire rotation. & Wear indicators cause the vehicle to hydroplane. The resulting loss of vehicle control can lead to an accident. NOTE For safety, inspect the tire tread regularly and replace the tires before their tread wear indicators become visible. & Tire rotation direction mark NOTE Loss of correct wheel alignment* causes the tires to wear on one side and reduces the vehicle's running stability. Contact your SUBARU dealer if you notice abnormal tire wear. *: The suspension system is designed to hold each wheel at a certain alignment (relative to the other wheels and to the road) for optimum straight-line stability and cornering performance. 1) 2) 3) New tread Worn tread Tread wear indicator Each tire incorporates a tread wear indicator, which becomes visible when the depth of the tread grooves decreases to 0.063 in (1.6 mm). A tire must be replaced when the tread wear indicator appears as a solid band across the tread. WARNING When a tire's tread wear indicator becomes visible, the tire is worn beyond the acceptable limit and must be replaced immediately. With a tire in this condition, driving at high speeds in wet weather can Example of tire rotation direction mark 1) Front If the tire has a rotation direction specification, the tire rotation direction mark is placed on its sidewall. When you install a tire that has the tire rotation direction mark, install the tire with