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:

    Connecting a USB Storage Device or iPod®
    The USB Port, located on the instrument panel or in the center console, can be used to control an iPod or a USB storage device. To avoid connection problems, extension cords are not recommended. Use ...

    Operating manual lift gate
    To open the lift gate, unlock it and push the lift gate opener switch A . Pull up the lift gate to open. The lift gate can be unlocked by: ► pushing the unlock button on the Intellig ...

    Engine Coolant Temperature Gauge
    This gauge shows the engine coolant temperature. If the indicator on the gauge moves towards the shaded area on the thermostat, it means that the engine coolant has overheated. If the vehicle has ...