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:

    Opening and closing the tailgate
    NOTICE Ensure there is minimum space of 39 in (1.0 m) above the rear of the vehicle before operating the tailgate. Insufficient space may result in damage to the vehicle. Do not operate the ...

    Entry by town
    If a town name is entered first, the points of interest listed will be restricted to that town. 1. From the Input POI Name screen, touch Town. 2. Enter the town name required. 3. Touch List to di ...

    Seats, seat belts and Supplemental Restraint System (SRS)
    1. Seat belt for 3rd row center seat belt (Page 1-27) 2. Roof-mounted curtain side-impact and rollover supplemental air bags (P.1-54) 3. Head Restraints (P.1-10) — Front-seat Active He ...