2004 JEEP GRAND CHEROKEE tire size

WARNING!
²Do not use a tire, wheel size or rating other than that
specified for your vehicle. Some combinations of
unapproved tires and wheels may change suspen-
sion dimensions and performance characteristics,
resulting in changes to steering, handling, and brak-
ing of your vehicle. This can cause unpredictable
handling and stress to steering and suspension com-
ponents. You could lose control and have an accident
resulting in serious injury or death. Use only the tire
and wheel sizes with load ratings approved for your
vehicle.
²Never use a tire smaller than the minimum tire size
listed on your vehicle's tire label. Using a smaller tire
could result in tire overloading and failure. You
could lose control and have an accident.
²Failure to equip your vehicle with tires having
adequate speed capability can result in sudden tire
failure and loss of vehicle control.
²Overloading your tires is dangerous. Overloading
can cause tire failure. Use tires of the recommended
load capacity for your vehicle - never overload them.
CAUTION!
Replacing original tires with tires of a different size
may result in false speedometer and odometer read-
ings. Check with your dealer before replacing tires
with a different size.
216 STARTING AND OPERATING

Alignment and Balance
The suspension components of your vehicle should be
inspected and aligned when needed, to obtain maximum
tire tread life.
Poor suspension alignment may result in:
²reduced tread life;
²uneven tire wear, such as feathering and one-sided
wear;
²vehicle pull to the right or to the left.
Tires may also cause the vehicle to pull left or right.
Alignment will not correct this problem. See your dealer
for proper diagnosis of the problem.
Improper alignment will not normally cause vehicle
vibration, which may be a result of tire and wheel
out-of-balance. Proper balancing will reduce vibration
and avoid tire cupping and spotty wear.
TIRE PRESSURE MONITOR SYSTEM Ð IF
EQUIPPED
The Tire Pressure Monitor System (TPM) monitors the
pressure in all 4 road tires and the full size spare (5 Tire
TPM System Only). The TPM system uses wireless
technology to monitor tire pressure levels. Sensors,
mounted to each wheel as part of the valve stem, transmit
tire pressure readings to a receiver located in the over-
head console. The tire pressure status is shown in the
Electronic Vehicle Information Center (EVIC) display.
Refer to ªOverhead Consoleº in Section 3 for more
information. The TPM system functions even when the
EVIC is not set on the tire pressure display screen.
The TPM system informs you of a low or high tire
pressure condition. If this occurs, correct your tire infla-
tion pressure as soon as possible, and inspect all of your
tires. Be sure to use a high quality gauge when adjusting
pressure. The TPM system is designed to monitor your
tire pressure but will not function as a tire pressure
STARTING AND OPERATING 217
5

gauge. There will be a delay between the instant you
adjust the air pressure in a tire and when the system
updates the display. The TPM system is not intended to
provide you with notification of rapid air loss.
The following chart indicates the TPM system pressure
levels. A threshold is the level at which the TPM system
provides you with an indication.
High Pressure Threshold 45 psi (310 kPa )
Placard Pressure (Cold) 33 psi (227 kPa)
Low Pressure Threshold 25 psi (172 kPa)
NOTE: A TPM system does not replace normal tire
maintenance.
CAUTION!
The TPM system has been optimized for the original
equipment tires and wheels. TPM system pressures
have been established for the tire size equipped on
your vehicle. Undesirable operation or sensor dam-
age may result when using replacement equipment
that is not of the same size, type, and/or style.
Aftermarket wheels can cause sensor damage. Do
not use tire sealant or balance beads if your vehicle
is equipped with TPM system as damage to the
sensors may result.
Tire Pressure Monitor System Tire/Wheel
Rotation and Sensor Replacement Ð If Equipped
With the 5 Tire TPM System, if a road tire and wheel is
replaced by the spare, the TPM system will detect the
swap automatically (after the ignition has been cycled)
218 STARTING AND OPERATING

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:
²Do not install tire chains or traction devices on ve-
hicles with larger than P225/75R16 size tires. These
tires are too large for sufficient body clearance with
chains or other traction devices.
²Use SAE class ªSº tire chains or traction devices only.
²Follow tire chain manufacturer's instructions for
mounting chains.
²Install chains snugly and tighten after 1/2 mile (1 km)
of driving.
²Do notexceed 35 mph (56 km/h), unless otherwise
specified by the chain manufacturer.
²Drive 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 main-
tain mud, snow, and wet traction levels, and contribute to
a smooth, quiet ride.
Follow the recommended tire rotation frequency for your
type of driving found in the ªMaintenance Schedulesº
Section of this manual. More frequent rotation is permis-
sible if desired. The reasons for any rapid or unusual wear
should be corrected prior to rotation being performed.
220 STARTING AND OPERATING

Supplemental Restraint System - Airbag........ 35
System, Navigation...................... 152
Tachometer............................ 129
Tape Player............................ 147
Temperature Control, Automatic............. 167
Temperature Gauge, Engine Coolant.......... 131
Tether Anchor, Child Restraint............... 47
Theft System Arming...................... 23
Theft System Disarming.................... 23
Tie Down Hooks, Cargo................... 119
Tilt Steering Column...................... 84
Time Delay, Headlight..................... 80
Tire and Loading Information Placard......... 207
Tire Identification Number (TIN)............. 206
Tire Markings.......................... 203
Tire Safety Information.................... 203
Tires ...............................53,211
Air Pressure.......................... 212Alignment and Balance.................. 217
Chains.............................. 220
Changing.........................238,242
Compact Spare........................ 241
General Information.................... 211
High Speed.......................... 213
Inflation Pressures..................... 212
Jacking............................. 242
Load Capacity.....................207,208
Pressure Monitor System...............92,217
Radial.............................. 214
Replacement......................... 215
Rotation..........................218,220
Safety............................53,203
Sizes............................... 204
Spare Tire........................... 239
Spinning............................ 214
Tread Wear Indicators................... 215
Wheel Mounting....................... 244
342 INDEX