Uniform Tire Quality Grading Standards

See also:

General notes
Have your vehicle winterproofed at a qualified specialist workshop at the onset of winter. Observe the notes in the "Changing a wheel" section . ...

Multifunction steering wheel
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Tire tread
WARNING Although the applicable federal motor vehicle safety laws consider a tire to be worn when the treadwear indicators (TWI) become visible at approximately 1/16 inches (1.6 mm), we recommend ...