2008 Chrysler 300 Owner Manual SRT8 - Page 457

IF YOU NEED CONSUMER ASSISTANCE 455 Call toll free at: • 1-800-890-4038 (U.S.) • 1-800-387-1143 (Canada) Or Visit us on the Worldwide Web at: • www.techauthority.daimlerchrysler.com • www.daimlerchrysler.ca/manuals DEPARTMENT OF TRANSPORTATION UNIFORM TIRE QUALITY GRADES The following tire grading categories were established by the National Highway Traffic Safety Administration. The specific grade rating assigned by the tire's manufacturer in each category is shown on the sidewall of the tires on your vehicle. All passenger car tires must conform to Federal safety 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 1-1/2 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. 9