Many people believe that the eccentric wear of concrete mixer tire is caused by the out of tolerance of wheel camber, but in fact, the eccentric wear of tire is largely caused by the out of tolerance of toe in value. According to the experience summarized by technicians engaged in four-wheel alignment for many years and a large number of positioning detection data, it is considered that the correct toe in value can effectively avoid the eccentric wear of tire.
Another kind of tire eccentric wear is caused by the out of tolerance of the large total angle of the steering wheel and the incorrect camber angle and kingpin angle. In the actual driving of the concrete mixer, most of them travel in a straight line. There is not much time for the large total angle during turning, reversing and turning, so the eccentric wear caused by this is relatively small.
The flexibility and random deformation characteristics of concrete mixer tires when contacting the ground largely offset the tire eccentric wear caused by wheel camber. Even if the wheel camber of high-pressure tires is out of tolerance, it has little impact on tire wear. Many Van trucks are empty in order to reduce the friction between tires and the ground Variable rear wheel camber is specially designed to reduce rolling resistance.
In terms of design, in order to restrict the tire eccentric wear caused by the camber angle of the concrete mixer truck when driving in a straight line, a specific toe in value is set for the mixer truck. Due to the different road conditions of the mixer truck and the existence of factors such as bumping, collision and wear of parts, even a relatively solid mixer truck, Its original positioning angle should gradually change the original toe in value due to the above reasons. Some values can be felt during driving as soon as they change, such as kingpin caster, wheel camber and more serious rear wheel toe in.