Tires And Wheels - Jeep Wrangler 1999 Electronic Service Manual

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TIRES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DESCRIPTION AND OPERATION
RADIAL-PLY TIRES . . . . . . . . . . . . . . . . . . . . . . . 2
REPLACEMENT TIRES . . . . . . . . . . . . . . . . . . . . 3
SPARE TIRE-TEMPORARY . . . . . . . . . . . . . . . . . 2
TIRE INFLATION PRESSURES . . . . . . . . . . . . . . 2
TIRE PRESSURE FOR HIGH SPEED
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
TIRES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DIAGNOSIS AND TESTING
PRESSURE GAUGES . . . . . . . . . . . . . . . . . . . . . 3
TIRE NOISE OR VIBRATION . . . . . . . . . . . . . . . . 4
DESCRIPTION AND OPERATION
TIRES
Tires are designed and engineered for each specific
vehicle. They provide the best overall performance
for normal operation. The ride and handling charac-
teristics match the vehicle's requirements. With
proper care they will give excellent reliability, trac-
tion, skid resistance, and tread life.
Driving habits have more effect on tire life than
any other factor. Careful drivers will obtain in most
cases, much greater mileage than severe use or care-
less drivers. A few of the driving habits which will
shorten the life of any tire are:
• Rapid acceleration
• Severe brake applications
• High speed driving
• Excessive speeds on turns
• Striking curbs and other obstacles
Radial-ply tires are more prone to irregular tread
wear. It is important to follow the tire rotation inter-
val shown in the section on Tire Rotation. This will
help to achieve a greater tread life.

TIRES AND WHEELS

CONTENTS
page
WHEELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
TIRES
INDEX
page
TIRE WEAR PATTERNS . . . . . . . . . . . . . . . . . . . . 3
TREAD WEAR INDICATORS . . . . . . . . . . . . . . . . 3
SERVICE PROCEDURES
MATCH MOUNTING . . . . . . . . . . . . . . . . . . . . . . . 4
REPAIRING LEAKS . . . . . . . . . . . . . . . . . . . . . . . 5
ROTATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
CLEANING AND INSPECTION
CLEANING TIRES . . . . . . . . . . . . . . . . . . . . . . . . 6
SPECIFICATIONS
TIRE SIZE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
TIRE IDENTIFICATION
Tire type, size, aspect ratio and speed rating are
encoded in the letters and numbers imprinted on the
side wall of the tire. Refer to the chart to decipher
the tire identification code (Fig. 1).
Performance tires have a speed rating letter after
the aspect ratio number. The speed rating is not
always printed on the tire sidewall. These ratings
are:
• Q up to 100 mph
• S up to 112 mph
• T up to 118 mph
• U up to 124 mph
• H up to 130 mph
• V up to 149 mph
• Z more than 149 mph (consult the tire manu-
facturer for the specific speed rating)
An All Season type tire will have either M + S, M
& S or M-S (indicating mud and snow traction)
imprinted on the side wall.
TIRE CHAINS
Tire snow chains may be used on certain models.
Refer to the Owner's Manual for more information.
TIRES AND WHEELS 22 - 1
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