text version of content this owner's manual page
from owners manual to the vehicle Mazda 6, year of production 2012:
Mazda6_8DQ8-EA-13L_Edition3 Page525
Friday, June 13 2014 6:23 PM
Black plate (525,1)
CustomerInformationandReportingSafetyDefects
UniformTireQualityGradingSystem(UTQGS)
UniformTireQualityGradingSystem(UTQGS)
This information relates to the tire grading system developed by the U.S. National
HighwayTraffic Safety Administration for grading tires by tread wear, traction, and
temperature performance.
qTreadWear
Thetread wear 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-a-half times as well on the government
course as a tire graded 100.
Therelative performance of tires depends upon the actual conditions of their use, however,
and may depart significantly from the norm because of variations in driving habits, service
practices and differences in road characteristics and climate.
qTraction-AA,A,B,C
Thetraction 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 braking (straight ahead) traction
tests and does not include acceleration cornering (turning), hydroplaning, or peak
traction characteristics.
qTemperature-A,B,C
Thetemperature grades A (the highest), B, and C, represent the tire's resistance to the
generation of heat and its ability to dissipate heat when tested under controlled conditions
on a specified indoor laboratory test wheel.
Sustained high temperature can cause the material of the tire to degenerate and reduce tire
life, and excessive temperatures can lead to sudden tire failure.
Grade C corresponds to a level of performance which all passenger vehicle tires must meet
under the Federal Motor Vehicle Safety Standard No. 109. Grades B and A represent
higher levels of performance on the laboratory test wheel than the minimum required by
law.
8-23
Form No.8DQ8-EA-13L
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