Buick LaCrosse: Treadwear 200 Traction AA 
Temperature A - Uniform Tire Quality Grading - Wheels and Tires - Vehicle Care - Buick LaCrosse Owners ManualBuick LaCrosse: Treadwear 200 Traction AA Temperature A

The following information relates to the system developed by the United States National Highway Traffic Safety Administration (NHTSA), which grades tires by treadwear, traction, and temperature performance. This applies only to vehicles sold in the United States. The grades are molded on the sidewalls of most passenger car tires. The Uniform Tire Quality Grading (UTQG) system does not apply to deep tread, winter-type snow tires, space-saver, or temporary use spare tires, tires with nominal rim diameters of 10 to 12 inches (25 to 30 cm), or to some limited-production tires.

While the tires available on General Motors passenger cars and light trucks may vary with respect to these grades, they must also conform to federal safety requirements and additional General Motors Tire Performance Criteria (TPC) standards.

All Passenger Car Tires Must Conform to Federal Safety Requirements In Addition To These Grades.

    Uniform Tire Quality Grading
    Quality grades can be found where applicable on the tire sidewall between tread shoulder and maximum section width. For example: ...

    Treadwear
    The treadwear grade is a comparative rating based on the wear rate of the tire when tested under controlled conditions on a specified government test course. For example, a tire graded 150 ...

    See also:

    Safety Chains
    Always attach chains between the vehicle and the trailer. Cross the safety chains under the tongue of the trailer to help prevent the tongue from contacting the road if it becomes separated ...

    Vehicle operation outside the USA and Canada
    If you plan to operate your vehicle in foreign countries, please be aware that:  - service facilities or replacement parts may not be readily available.  - unleaded fuel for vehicles w ...

    Wheels
    If a wheel is bent, cracked or heavily corroded, it should be replaced. Otherwise, the tire may separate from the wheel or cause a loss of handling control. ...