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:
Tread Wear Indicators
Tread wear indicators are in the original equipment tires
to help you in determining when your tires should be
replaced.
1 — Worn Tire
2 — New Tire
These indicators are molded into the b ...
Intermittent Wiper System
Use the intermittent wiper system when weather conditions
make a single wiping cycle with a variable pause
between cycles desirable. Rotate the end of the windshield
wiper/washer control lever t ...
Frontal Area
The frontal area is the maximum height multiplied by the
maximum width of the front of a trailer. ...