Department Of Transportation Uniform Tire Quality Grades

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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:

Trailer Sway Control – If Equipped
The trailer sway control is a telescoping link that can be installed between the hitch receiver and the trailer tongue. It typically provides adjustable friction associated with the telescoping mo ...

Tire Markings
1 — U.S. DOT Safety Standards Code (TIN) 2 — Size Designation 3 — Service Description 4 — Maximum Load 5 — Maximum Pressure 6 — Treadwear, Traction and Temperature Grades NOTE ...

Temperature Grades
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