2012 Jeep Grand Cherokee Owner Manual - Page 502

500 STARTING AND OPERATING CAUTION! (Continued) • Observe the traction device manufacturer's instructions on the method of installation, operating speed, and conditions for use. Always use the suggested operating speed of the device manufacturer's if it is less than 30 mph (48 km/h). • Do not use traction devices on a compact spare tire. 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 SNOW TIRES poorer than that of non-studded tires. Some states proSome areas of the country require the use of snow tires hibit studded tires; therefore, local laws should be during the winter. All season tires can be indicated by the checked before using these tire types. M+S designation on the tire sidewall. If you need snow tires, select tires equivalent in size and TIRE ROTATION RECOMMENDATIONS type to the original equipment tires. Use snow tires only The tires on the front and rear of your vehicle operate at in sets of four; failure to do so may adversely affect the different loads and perform different steering, handling, and braking functions. For these reasons, they wear at safety and handling of your vehicle. unequal rates.