Nissan Altima: Uniform tire quality grading - Technical and consumer information - Nissan Altima Owners ManualNissan Altima: 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 on the tire sidewall between tread shoulder and maximum section width. For example:

Treadwear 200 Traction AA Temperature A

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.

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 government test surfaces of asphalt and concrete. A tire marked C may have poor traction performance.

WARNING

The traction grade assigned to this tire is based on straight-ahead braking traction tests, and does not include acceleration, cornering, hydroplaning, or peak traction characteristics.

Temperature A, B and C

The temperature grades are A (the highest), B, and C, representing the tire’s resistance to the generation of heat, and its ability to dissipate heat when tested under controlled conditions on a specified indoor laboratory test wheel. Sustained high temperature can cause the material of the tire to degenerate and reduce tire life, and excessive temperature can lead to sudden tire failure. The grade C corresponds to a level of performance which all passenger car tires must meet under the Federal Motor Safety Standard No. 109. Grades B and A represent higher levels of performance on the laboratory test wheel than the minimum required by law.

WARNING

The temperature grade for this tire is established for a tire that is properly inflated and not overloaded. Excessive speed, under-inflation, or excessive loading, either separately or in combination, can cause heat build-up and possible tire failure.

    Continuously Variable Transmission (if so equipped)
    To tow a vehicle equipped with a continuously variable transmission, an appropriate vehicle dolly MUST be placed under the towed vehicle’s drive wheels. Always follow the dolly manufacturer’s ...

    Emission control system warranty
    Your NISSAN vehicle is covered by the following emission warranties: For USA 1. Emission Defects Warranty 2. Emissions Performance Warranty Details of this warranty may be found with other vehic ...

    See also:

    Door locks/unlocks precaution
    -Do not push the door handle request switch with the Intelligent Key held in your hand as illustrated. The close distance to the door handle will cause the Intelligent Key system to have difficu ...

    Panic alarm
    •► To activate: press button 1 for at least one second. An alarm sounds and the exterior lighting flashes. •► To deactivate: press button 1 again. or •► ...

    Power steering
    The power assisted steering uses a hydraulic pump, driven by the engine, to assist steering. If the engine stops or the drive belt breaks, you will still have control of the vehicle. However, much ...