Tire Safety Information
3.5.1.2 UTQGS Information
Treadwear Number
This number indicates the tire's wear rate. The higher the treadwear number is, the
longer it should take for the tread to wear down. For example, a tire graded 400
should last twice as long as a tire graded 200.
Traction Letter
This letter indicates a tire's ability to stop on wet pavement. A higher graded tire
should allow you to stop your car on wet roads in a shorter distance than a tire with
a lower grade. Traction is graded from highest to lowest as "AA","A", "B", and "C".
Temperature Letter
This letter indicates a tire's resistance to heat. The temperature grade is for a tire
that is inflated properly and not overloaded. Excessive speed, underinflation or
excessive loading, either separately or in combination, can cause heat build-up
and possible tire failure. From highest to lowest, a tire's resistance to heat is
graded as "A", "B", or "C".
3.5.1.3 Additional Information on Light Truck Tires
Please refer to the following diagram.
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Tires for light trucks have other markings besides those found on the sidewalls of
passenger tires.
LT The "LT" indicates the tire is for light trucks or trailers.
ST An "ST" is an indication the tire is for trailer use only.