Question

Why a truck or motor bus has much wider tyres reason

Answer 1

a truck or a motor bus has wider tyres so they don't slip when it goes upon a rock or any obstacle and because it carries to much load

Answer 2

the truck and motor bus has wider tyres because as more the area less the pressure . as the area increase the pressure will decrease , so there will be less need to apply more pressure to handle the vehicle ....the vehicle will move smoothly