The active surface of the tire in operation must have a clearly visible pattern along the entire perimeter and along the entire width of the upper tread with the depth of the main tracks of the tread pattern:
All vehicles have at least 1.0 mm .
For passenger cars 1.5 mm and for trucks 2.0 mm .
For mopeds not less than 1.0 mm and for other transport categories not less than 1.6 mm .