Dodge Challenger SRT 2016 Owner's Manual page 597

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 load-
ing, either separately or in combination, can cause
heat buildup and possible tire failure.
IF YOU NEED CONSUMER ASSISTANCE 595
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