The effective area of the tire tread in service shall have a clearly visible tread pattern throughout the circumference and the full width of the upper tread with the depth of the main tread grooves:
For all vehicles at least 1.0 mm .
5 mm for passenger cars and 2.0 mm for trucks .
For mopeds at least 1.0 mm and for vehicles of other categories at least 1.6 mm .