2007 Jeep Grand Cherokee Owner's Manual - Page 294

294 STARTING AND OPERATING Improper alignment will not cause vehicle vibration. Vibration may be a result of tire and wheel out-ofbalance. Proper balancing will reduce vibration and avoid tire cupping and spotty wear. TIRE CHAINS Certain models have sufficient tire-to-body clearance to allow use of tire chains. Install chains on rear tires only. Follow these recommendations to guard against damage and excessive tire and chain wear: • Do not install tire chains or traction devices on vehicles with larger than P235/65R17 size tires. Tires larger than this may not provide sufficient body clearance with chains or other traction devices. • Use SAE class "S" tire chains or traction devices only. • Follow tire chain manufacturer's instructions for mounting chains. • Install chains snugly and tighten after 1/2 mile (1 km) of driving. • Do not exceed 35 mph (56 km/h), unless otherwise specified by the chain manufacturer. • Drive cautiously, avoiding large bumps, potholes and extreme driving maneuvers. TIRE ROTATION RECOMMENDATIONS Tires on the front and rear axles of vehicles operate at different loads and perform different steering, handling, and braking functions. For these reasons, they wear at unequal rates, and develop irregular wear patterns. These effects can be reduced by timely rotation of tires. The benefits of rotation are especially worthwhile with aggressive tread designs such as those on On/Off Road type tires. Rotation will increase tread life, help to maintain mud, snow, and wet traction levels, and contribute to a smooth, quiet ride.