2009 Chrysler Town & Country Owner Manual - Page 519

IF YOU NEED CONSUMER ASSISTANCE 517 in each category is shown on the sidewall of the tires on wet pavement, as measured under controlled conditions on specified government test surfaces of asphalt and your vehicle. concrete. A tire marked C may have poor traction perforAll passenger car tires must conform to Federal safety mance. requirements in addition to these grades. Treadwear The Treadwear grade is a comparative rating, based on the wear rate of the tire when tested under controlled conditions on a specified government test course. For example, a tire graded 150 would wear one and one-half times as well on the government course as a tire graded 100. The relative performance of tires depends upon the actual conditions of their use, however, and may depart significantly from the norm due to variations in driving habits, service practices, and differences in road characteristics and climate. WARNING! The traction grade assigned to this tire is based on straight-ahead braking traction tests, and does not include acceleration, cornering, hydroplaning, or peak traction characteristics. 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 Traction Grades test wheel. Sustained high temperature can cause the The Traction grades, from highest to lowest, are AA, A, B, material of the tire to degenerate and reduce tire life, and and C. These grades represent the tire's ability to stop on excessive temperature can lead to sudden tire failure. The 9