DOT Quality Grades
Treadwear
Traction AA A B C
Temperature A B C
Conform to Federal Safety Requirements
All passenger car tires must conform to
Federal Safety Requirements in addition to
these grades.◀
See also:
BMW X3 iDrive Owners Manual
h1 {color: red;}
h2 {color: green;}
h3 {color: blue;}
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Tire tread
Summer tires
Do not drive with a tire tread depth of less than
0.12 in/3 mm.
There is an increased danger of hydroplaning if
the tread depth is less than 0.12 in/3 mm.
Winter tires
Do not driv ...
Tachometer
Always avoid engine speeds in
the red warning field. In this
range, the fuel supply is interrupted
to protect the engine. ...