2011 Jeep Grand Cherokee Owner Manual - Page 416

414 STARTING AND OPERATING Snow tires generally have lower speed ratings than what was originally equipped with your vehicle and should not be operated at sustained speeds over 75 mph (120 km/h). For speeds above 75 mph (120 km/h) refer to original equipment or an authorized tire dealer for recommended safe operating speeds, loading and cold tire inflation pressures. While studded tires improve performance on ice, skid and traction capability on wet or dry surfaces may be poorer than that of non-studded tires. Some states prohibit studded tires; therefore, local laws should be checked before using these tire types. 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. Refer to the "Maintenance Schedule" for the proper maintenance intervals. More frequent rotation is permissible if desired. The reasons for any rapid or unusual wear should be corrected prior to rotation being performed. NOTE: The premium Tire Pressure Monitor System will automatically locate the pressure values displayed in the TIRE ROTATION RECOMMENDATIONS The tires on the front and rear of your vehicle operate at correct vehicle position following a tire rotation. different loads and perform different steering, handling, The suggested rotation method is the "forward-cross" and braking functions. For these reasons, they wear at shown in the following diagram. unequal rates.