Temperature Grades - Alfa Romeo 4C spider User Manual

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.
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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 corre-
sponds 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 es-
tablished for a tire that is properly inflated
and not overloaded. Excessive speed,
under-inflation, or excessive loading, ei-
ther separately or in combination, can
cause heat buildup and possible tire fail-
ure.