Why does tractor have large tires bulldozers have caterpillar tracks and heavy lorries may need eight rear wheels?

Tractors have large tires to provide better traction and distribute weight over soft or uneven ground, allowing them to work efficiently in agricultural settings. Bulldozers use caterpillar tracks to enhance stability and grip on rugged terrain, preventing them from sinking into soft soil. Heavy lorries may require eight rear wheels to support significant loads, ensuring better weight distribution and improving stability while driving. This design helps prevent tire wear and damage while enhancing overall safety and load-carrying capabilities.