Subaru Legacy: Treadwear - Uniform tire quality grading standards - Consumer information and Reporting safety defects - Subaru Legacy Owners ManualSubaru Legacy: 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 would wear one and one-half (1- 1/2) times as well on the government course as a tire graded 100. The relative performance of tires depends upon the actual conditions of their use, however, and may depart significantly from the norm due to variations in driving habits, service practices and differences in road characteristics and climate.

    Uniform tire quality grading standards
    This information indicates the relative performance of passenger car tires in the area of treadwear, traction, and temperature resistance. This is to aid the consumer in making an informed choice ...

    Traction AA, A, B, C
    The traction grades, from highest to lowest, are AA, A, B and C. Those grades represent the tire’s ability to stop on wet pavement as measured under controlled conditions on specified government ...

    See also:

    Pedals
    WARNING Make sure absolutely no objects are obstructing the pedals' range of movement. Keep the driver's footwell clear of all obstacles. If there are any floormats or carpets in the footw ...

    Manual transmission (if so equipped)
    WARNING ● Do not downshift abruptly on slippery roads. This may cause a loss of control. ● Do not over-rev the engine when shifting to a lower gear. This may cause a loss of control o ...

    Towing Requirements
    To promote proper break-in of your new vehicle drivetrain components the following guidelines are recommended: CAUTION! • Do not tow a trailer at all during the first 500 miles (805 km) the ne ...