2014 Chrysler 300 Owner Manual - Page 598

596 IF YOU NEED CONSUMER ASSISTANCE significantly from the norm due to variations in driving Temperature Grades habits, service practices, and differences in road charac- The temperature grades are A (the highest), B, and C, teristics and climate. representing the tire's resistance to the generation of heat and its ability to dissipate heat, when tested under Traction Grades controlled conditions on a specified indoor laboratory The Traction grades, from highest to lowest, are AA, A, B, test wheel. Sustained high temperature can cause the and C. These grades represent the tire's ability to stop on material of the tire to degenerate and reduce tire life, and wet pavement, as measured under controlled conditions on excessive temperature can lead to sudden tire failure. The specified government test surfaces of asphalt and concrete. grade C corresponds to a level of performance, which all A tire marked C may have poor traction performance. passenger car tires must meet under the Federal Motor Vehicle Safety Standard No. 109. Grades B and A repreWARNING! sent higher levels of performance on the laboratory test The traction grade assigned to this tire is based on wheel, than the minimum required by law. straight-ahead braking traction tests, and does not include acceleration, cornering, hydroplaning, or peak traction characteristics.