I don't know of a heavy truck with eight wheels. It would have six, 10, 12 or 14 and 18 if it was a tractor and trailer.
It's because (a) the more wheels it has, the more weight it can carry, and (b) more wheels means more traction on the road.
Weight distribution over the surface of the roadway.
We all are familiar with different types of trucks.But we know a less about boom truck. A boom truck is a kind of truck that can move with heavy equipments. Source:http://www.i80equipment.com/bucket-trucks-41.shtml
In a heavy truck, each wheel has to support large road and the pressure on the road due to each wheel is large. Since, pressure = force/area Using of extra wheels reduces the pressure on road due to each wheel. This prevents the wheel from causing damage to the road as well as sinking into soft ground. This is why, extra wheels are used in heavy vehicles.
To haul heavy loads, there needs to be more wheels to carry the loads.
form_title= Truck Wheels form_header= Buy new truck wheels. Is your truck lifted?*= () Yes () No What size tire do you need?*= _  Do you have a commercial truck?*= () Yes () No
Multiple tools exist to help move heavy objects. The most common is a hand truck or dolly, which is upright with two wheels that allows heavier objects to move with less force.
A lifted truck is a truck that has had its suspension altered to increase the height of the vehicle, and sometimes fitted with large wheels. This increases road clearance and makes the vehicle appear to be larger than stock vehicles.
A dually vehicle is typically a truck that carries heavy or large loads and that has 4 wheels on one axle instead of the usual two wheels on one axle.
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 wheelerSo 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 wheelsHouse 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.
yes they do there bigger then semi truck wheels also the mall truck has the biggest wheels