A tire's temperature grade indicates how well the tire can dissipate heat under test conditions, assuming proper inflation and maintenance of the tire. There are three possible traction grades: A, B, and C.
A rating of A is the highest possible temperature grade, while C is the lowest.
Temperature grades are determined in a controlled test environment, where the tire repeatedly undergoes speed tests until it is destroyed. Depending on how long the tire endures these tests, a temperature grade is assigned.
A temperature grade of C indicates that the tire meets minimum standards set by the U.S. government.
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