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.

See also:

Vehicle Storage
If you are leaving your vehicle dormant for more than 21 days you may want to take steps to protect your battery. You may: • Remove fuse #J13 in the Totally Integrated Power Module (TIPM) lab ...

Tire Terminology And Definitions
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After Starting
The idle speed is controlled automatically and it will decrease as the engine warms up. ...