An improved run flat tire and system for use with a two-piece or multi-piece wheel and tire to provide for continued operation of vehicles after tire deflation. Certain aspects of the invention include a plurality of arcuate sections releasably aligned and secured to each other for positioning around a wheel, wherein extended lip portions of each arcuate section extend laterally from the inner base portion of each arcuate section to limit lateral movement of the run flat device relative to the wheel.