Infiniti QX: Treadwear - Uniform tire quality grading - Technical and consumer information - Infiniti QX Owner's ManualInfiniti QX: 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 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
    DOT (Department Of Transportation) Quality Grades: All passenger car tires must conform to federal safety requirements in addition to these grades. Quality grades can be found where applicable ...

    Traction AA, A, B and 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:

    CD Player
    Playing a CD Insert a CD partway into the slot, label side up. The player pulls it in and the CD should begin playing. EJECT: Press and release to eject the disc that is currently playing. A be ...

    Distance Control Assist (DCA) system (if so equipped)
    The Distance Control Assist (DCA) system brakes and moves the accelerator pedal upward according to the distance from and the relative speed of the vehicle ahead to help assist the driver to m ...

    Speedometer and odometer
    Speedometer Speedometer The speedometer indicates vehicle speed in miles per hour (MPH) and kilometers per hour (km/h). Odometer/twin trip odometer Odometer/twin trip odometer The o ...