Abstract: The present invention is a tire derimming device adapted to separate the rubber portion of a tire from its rim and ring. The derimming device generally comprises a power actuator that contacts and bends the rim until the bead pops from the rim and the rim falls out of the tire thereby separating the rim from the ring. The device further comprises a shearing assembly for cutting the rubber portion of the tire into multiple pieces after the rim has been removed from the tire.