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:

    Snow tires
    If snow tires are needed, it is necessary to select tires equivalent in size and load rating to the original equipment tires. If you do not, it can adversely affect the safety and handling of yo ...

    Wipers and washers
    Windshield wiper/washer Rear window wiper/washer (if equipped) A : Wiper speed control · MIST/ – Single wipe · OFF – Off · INT – Intermittent wipe (if equipped) · LO – Low wiper ...

    Comfort
    Comfort mode offers a somewhat softer ride and the transmission shifts gears at lower rpm. This mode is particularly suitable for long-distance highway driving. The indicator light in the butto ...