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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.
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.
Temperature Grades
The Temperature grades are A (the
highest), B, and C, representing 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 temperature can lead to
sudden tire failure. The 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.
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.
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