Subaru Forester: Treadwear - Uniform tire quality grading standards - Consumer information and Reporting safety defects - Subaru Forester Owner's ManualSubaru Forester: 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 ch ...

    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 govern ...

    See also:

    SRS airbags
    The SRS airbags inflate when the vehicle is subjected to certain types of severe impacts that may cause significant injury to the occupants. They work together with the seat belts to help reduce the ...

    High beam assist
    This feature of the Xenon lighting automatically selects and deselects high beam, under specific conditions of road lighting and in the absence of other vehicle’s lights. The system is only acti ...

    Dolly Towing (All-Wheel&-Drive Vehicles)
    All-wheel&-drive vehicles should not be towed with two wheels on the ground. To properly tow these vehicles, they should be placed on a platform trailer with all four wheels off of the ground ...