DOT Quality Grades

Treadwear
Traction AA A B C
Temperature A B C

All passenger car tires must conform to Conform to Federal Safety Requirements
All passenger car tires must conform to Federal Safety Requirements in addition to these grades.◀

    See also:

    Driving pleasure
    Driving the X6 M changed the way I looked at this vehicle. Some of that gangly look disappeared as the vehicle's performance matured my perception. It has a toughness, a meanness too that it didn' ...

    Socket for OBD OnboardDiagnosis
    Position There is an OBD socket on the driver's side for checking the primary components in the vehicle emissions. Emissions ► The warning lamp lights up: Emissions are deteriorati ...

    Two additional gears mean threefold progress: quicker shifts, greater smoothness, enhanced efficiency.
    The wider spread of ratios allows the engine to run at lower speeds, often in the "tallest" gear, 8th. Yet even with this wider spread, the steps between adjacent gears are reduced; in t ...