The tractor driving wheel and the ground produced between the maximum adhesion ability and the ability to resist skidding, called the adhesion of the tractor performance. If the adhesion performance is good, the skid is light, the driving torque can make full use of, the ability of the internal combustion engine can also get full play, the tractor appears strong when working.
If the adhesion performance is poor, skid seriously, the driving torque can not make full use of, the ability of the internal combustion engine can not get full play, the tractor in the work is not strong enough to make, or the tractor does not have much strength. Driving wheel seriously skid, will reduce the speed of the tractor, production and economic decline, but also accelerate the wear of driving wheel tires, in addition to soil structure will be destroyed.