Jeep Grand Cherokee User Manual page 84

Tire Inflation Pressures
The tire pressure should be checked and ad-
justed at least once every month. Check more
often if subject to a wide range of outdoor tem-
peratures, as tire pressures vary with temperature
changes.
Inflation pressures specified on the chart are
always "Cold Inflation Pressure." Cold inflation
pressure is defined as the tire pressure after the
vehicle has been idle for at least 3 hours, or driven
less than a mile after a 3 hour period. The cold
inflation pressure must not exceed the maximum
values molded into the tire sidewall.
Cold Tire Pressures
Tire Size Pressures
P235/65HR17 BSW 227 kPa (33 psi)
[2.275 bar]
P235/65TR17 BSW 227 kPa (33 psi)
[2.275 bar]
P235/65HR17 OWL 227 kPa (33 psi)
[2.275 bar]
Full Size Spare 227 kPa (33 psi)
[2.275 bar]
Tire pressures may increase from 13 to 40 kPa (2
to 6 psi) [0.138 to 0.414 bar] during operation. DO
NOT reduce this normal pressure buildup.
82
Tire Rotation
Tires on the front and rear axles of vehicles
operate at different loads and perform different
steering, driving, 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.
Rotation is recommended at 12 000 km (7,500
miles) if you are following Maintenance Schedule
"A" and at 5 000 km (3,000 miles) intervals if you
are following Maintenance Schedule "B". More
frequent rotation is permissible if desired. The
reasons for any rapid or unusual wear should be
corrected before you rotate the tires.
Alignment and Balance
Tire suspension components of your vehicle
should be inspected and aligned when needed,
to obtain full tire tread mileage.
Poor suspension alignment may result in:
• fast tire wear
• uneven tire wear (such as feathering and one-
sided wear)
• vehicle pull to the right or to the left.
• steering wheel off center
Tires may also cause your vehicle to pull to the left
or right. Alignment won't correct this problem. See
your dealer for proper diagnosis of the problem.