How many wheels a truck has?

Answer 1

A truck has one front axle and one or more rear axles which typically have dual wheels on each side.
Common configuration: one rear axle - 6 wheeler
So apart from the steering wheel Caterpillar 797- B (biggest dump truck in the world) has 6 14 foot tires and the Australian centipede has 30 wheels
House movers and heavy equipment moving trucks alter their wheel configuration depending on the load. For heavy load they can apply 40 or even more wheels.

Answer 2

A truck has