Life Of Tire - Jeep 2009 Grand Cherokee Owner's Manual

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1 — Worn Tire
2 — New Tire
These indicators are molded into the bottom of the tread
grooves. They will appear as bands when the tread depth
becomes 1/16 in (2 mm). When the indicators appear in
two or more adjacent grooves, the tire should be re-
placed.
Many states have laws requiring tire replacement at this
point.

Life Of Tire

The service life of a tire is dependent upon various
factors including but not limited to:
Driving style
Tire pressure
Distance driven
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 and have an accident resulting
in serious injury or death.
STARTING AND OPERATING 341
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