The number of wheels is variable according to the lorries size and the load it is able to carry. For instance, a small lorry, used for light loads, may have four wheels (as does a car), or dual-wheels on the rear axle and single wheels on the front. Larger, rigid lorries, and articulated lorries, especially, may have more than one set of rear dual-wheels.
so that pressure will decrease and road will not sink
Weight distribution over the surface of the roadway.
Being that it is a push mower, the advantage is not having to lower the handle so far to raise the front wheels when making a sharp turn-around.
Has to be towed from behind and the rear wheels OFF the ground or you will have to rebuild the transmission
Depends on the type of trailer you are pulling but for the most yes 8 wheels on the trailer 8 drive tires on the rear of the truck 2 steer tires there you have your 18 wheeler If you re using Super singles ( the single wide tires), then just 4 tires.
a bus has 8 wheels
The main difference is that the 8 lug wheels can carry more weight.
8 lug wheels are better than 5 lug wheels because there is a wide selection of 8lug wheels
Each car has 8 wheels.
A bus has exactly 8 wheels everybody who say 4 is wrong
Depends on the vehicle. Each wheel has an inner and outer pad. So if it has front disk brakes, 4 in total. If the vehicle has rear disk brakes also, another 4 pads for the rear wheels