The working site of the tractor is in the field, and most of the work is heavy, so the "size" of the wheel has to be taken into special consideration. The front wheel of the tractor is mainly to guide the direction, also known as the guide wheel. If the front wheel is made wide and large, when the tractor driver adjusts the steering wheel to rotate the front wheel, in order to overcome the resistance of the wheel, it must spend more energy, and it is very difficult to operate. The soil in the field is soft and rough, and if the front wheel is wide and large, the ground will increase its resistance to it. The rear wheels of a tractor are the driving wheels. In other words, the power is transferred directly to the rear wheel, and the weight it carries is much heavier than the front wheel.
When the tractor operates in the field, it is always necessary to drag on a farm machine, such as a seeder, a rice transplanter, a disk plow, and so on. These machines are made of steel, and when they are attached to the tractor, part of their weight is transferred to the tractor. The tractor itself also has weight, and now there is an additional burden, and the center of gravity of the whole machine falls on the rear wheel of the tractor. In this case, if the rear wheel is the same size as the front wheel, the average weight of the rear wheel is much greater than the front wheel, and the rear wheel of the tractor will be stuck in the soft field. The rear wheel is wide, and its contact surface with the ground is large, so that the weight borne by the unit area is smaller, so that the average weight of the front and rear wheels of the tractor is not very different. Of course, the rear wheel has been widened, and the resistance it receives has indeed increased, but this is the need for its "duty". Therefore, the current wheeled tractors are generally small front wheels and large rear wheels.Wheel Tractor
