If you need consumer assistance

Department Of Transportation Uniform TireQuality Grades

~1min read

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.

Test yourself

A quick Fiat 500 quiz: every answer comes with an explanation and a link to the manual page.