Jeep 2012 Grand Cherokee - Owner Manual - Manual (Page 500)

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