Jeep Grand Cherokee SRT 2019 Owner's Manual page 246

These indicators are molded into the bottom of
the tread grooves. They will appear as bands
when the tread depth becomes a 1/16 of an inch
(1.6 mm). When the tread is worn to the tread
wear indicators, the tire should be replaced.
Refer to "Replacement Tires" in this section for
further information.
Life Of Tire
The service life of a tire is dependent upon
varying factors including, but not limited to:
• Driving style.
• Tire pressure - Improper cold tire inflation
pressures can cause uneven wear patterns to
develop across the tire tread. These abnor-
mal wear patterns will reduce tread life, re-
sulting in the need for
replacement.
• Distance driven.
• Performance tires, tires with a speed rating of
V or higher, and Summer tires typically have
a reduced tread life. Rotation of these tires
per the vehicle's Service and Warranty Hand-
book is highly recommended.
WARNING!
Tires and the spare tire should be replaced
after six years, regardless of the remaining
tread. Failure to follow this warning can result
in sudden tire failure. You could lose control
WARNING! (Continued)
and have a collision resulting in serious injury
or death.
NOTE:
Wheel Valve Stem must be replaced as well
when installing new tires due to wear and tear in
existing tires.
Keep dismounted tires in a cool, dry place with
as little exposure to light as possible. Protect
tires from contact with oil, grease, and gasoline.
Replacement Tires
The tires on your new vehicle provide a balance
of many characteristics. They should be in-
spected regularly for wear and correct cold tire
earlier tire
inflation pressures. The manufacturer strongly
recommends that you use tires equivalent to the
originals in size, quality and performance when
replacement is needed. Refer to the paragraph
on "Tread Wear Indicators" in this section. Refer
to the Tire and Loading Information placard or
the Vehicle Certification Label for the size des-
ignation of your tire. The Load Index and Speed
Symbol for your tire will be found on the original
equipment tire sidewall.
It is recommended to replace the two front tires
or two rear tires as a pair. Replacing just one tire
can seriously affect your vehicle's handling. If
you ever replace a wheel, make sure that the
wheel's specifications match those of the origi-
nal wheels.
(Continued)
It is recommended you contact an authorized
tire dealer or original equipment dealer with any
questions you may have on tire specifications or
capability. Failure to use equivalent replacement
tires may adversely affect the safety, handling,
and ride of your vehicle.
WARNING!
• Do not use a tire, wheel size, load rating, or
speed rating other than that specified for
your vehicle. Some combinations of unap-
proved tires and wheels may change sus-
pension dimensions and performance
characteristics, resulting in changes to
steering, handling, and braking of your
vehicle. This can cause unpredictable han-
dling and stress to steering and suspen-
sion components. You could lose control
and have a collision resulting in serious
injury or death. Use only the tire and wheel
sizes with load ratings approved for your
vehicle.
• Never use a tire with a smaller load index
or capacity, other than what was originally
equipped on your vehicle. Using a tire with
a smaller load index could result in tire
overloading and failure. You could lose
control and have a collision.
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