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:
Setup
To switch to system setup, you may say on of the
following:
• “Change to setup”
• “Switch to system setup”
• “Change to setup”
• “Main menu setup” or
• “Switch ...
Engine Break-In Recommendations
A long break-in period is not required for the engine and drivetrain (transmission
and axle) in your vehicle.
Drive moderately during the first 500 miles (800 km).
After the initial 60 miles (100 ...
Traction Grades
The Traction grades, from highest to lowest, are AA, A, B,
and C. These grades represent the tire’s ability to stop on
wet pavement, as measured under controlled conditions
on specified govern ...