Department Of Transportation Uniform Tire Quality Grades; Treadwear; Traction Grades - Chrysler 300 2018 User Manual

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 addition to
these grades.

Treadwear

The Treadwear grade is a comparative rat-
ing, based on the wear rate of the tire when
tested under controlled conditions on a
specified government test course. For ex-
ample, 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 ac-
tual conditions of their use, however, and
may depart significantly from the norm due
to variations in driving habits, service prac-
tices, and differences in road characteristics
and climate.

Traction Grades

The Traction grades, from highest to lowest,
are AA, A, B, and C. These grades repre-
sent the tire's ability to stop on wet pave-
ment, as measured under controlled condi-
tions 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.
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