Department Of Transportation Uniform Tire Quality Grades - Chrysler 300 2017 User Manual

M A I N T A I N I N G Y O U R V E H I C L E
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 de-
pends upon the actual conditions of their use, however, and may depart signifi-
cantly from the norm due to variations 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.
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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