What is the tread depth of the truck without steering wheel?
3.2 mm. According to the Training Textbook of Drivers' Qualification for Road Passenger and Freight Transport, the tread depth of tire crown: the tread depth of truck steering wheel shall not be less than 3.2 mm, that is, greater than or equal to 3.2 mm; The tread depth of other tires shall not be less than1.6mm. ..