− W arning: The temperature grade for
this tire is established for a tire that
is properly inflated and not over-
loaded. Excessive speed, underinfla-
tion, or excessive loading, either
separately or in combination, can
cause heat buildup and possible tire
failure.
The t emperature 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 t o degenerate a nd 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. Gra des B and A
represent higher levels of
performance on the laboratory test
wheel than the minimum required by
law.
Temperature A,B,C
DOT Tire Quality Grading (U.S. Vehicles)
266
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