Department Of Transportation Uniform; Tire Quality Grades; Treadwear; Traction Grades - Chrysler 300c Owner's Manual

20_LX_OM_ENA_GCC_t.book Page 245
DEPARTMENT OF TRANSPORTATION
UNIFORM TIRE QUALITY GRADES
The following tire grading categories
were established by the National
Highway Traffic Safety Administration.
The specific grade rating assigned by the
tire's manufacturer in each category is
shown on the sidewall of the tires on
your vehicle.
All passenger vehicle tires must conform
to Federal safety requirements in addi-
tion to these grades.

Treadwear

The Treadwear grade is a comparative
rating, based on the wear rate of the tire
when tested under controlled conditions
on a specified government test course.
For example, a tire graded 150 would
wear one and one-half times as well on
the government course as a tire graded
100. The relative performance of tires
depends upon the actual conditions of
their use, however, and may depart
significantly from the norm due to varia-
tions in driving habits, service practices,
and differences in road characteristics
and climate.

Traction Grades

The Traction grades, from highest to
lowest, are AA, A, B, and C. These grades
represent the tire's ability to stop on wet
pavement, as measured under
controlled conditions on specified
government test surfaces of asphalt and
concrete. A tire marked C may have poor
traction performance.
WARNING!
The traction grade assigned to this tire is
based on straight-ahead braking traction
tests, and does not include acceleration,
cornering, hydroplaning, or peak traction
characteristics.
SERVICING AND MAINTENANCE

Temperature Grades

WARNING!
The temperature grade for this tire is
established for a tire that is properly inflated
and not overloaded. Excessive speed,
under-inflation, or excessive loading, either
separately or in combination, can cause heat
buildup and possible tire failure.

VEHICLE STORAGE

If you are leaving your vehicle dormant for more
than 21 days, you may want to take these steps
to protect your battery.
NOTE:
SRT (if equipped), storage between 21-60 days
can use Storage Mode rather than discon-
necting the battery. Storage Mode can be found
in the instrument cluster display under vehicle
info/battery page.
Disconnect the negative cable from the

battery.
Anytime you store your vehicle, or keep it out

of service (e.g., vacation) for two weeks or
more, run the air conditioning system at idle
245
7