A wheeled crane is a rotating crane that uses a wheeled chassis to move its boom. Tire crane is a fully rotating crane that installs the lifting mechanism on a specially designed chassis composed of heavy-duty tires and axles. Its upper structure is basically the same as that of a crawler crane. In order to ensure the stability of the body during installation operations, the crane is equipped with four extendable legs. On flat ground, it is not necessary to use legs for small lifting and low-speed travel of lifted objects. It consists of two parts: boarding and disembarking.