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:

    Towing a vehicle with both axles onthe ground
    When having your vehicle towed, observe the important safety notes. WARNING   The power assistance for the steering and the brake force booster do not work when the engine is not runnin ...

    Front auxiliary input jacks
    The front auxiliary input jacks are located in the console box. NTSC compatible devices such as video games, camcorders and portable video players can be connected to the auxiliary jacks. Co ...

    Operating tips
    ► The images from a device that is connected to the rear auxiliary input jacks cannot be viewed on the front displays. ► It is not possible to switch the source to USB (if so equ ...