Easily one of the best selling 4 and 5 bike hitch rack systems ever, the heavy duty Road Runners are built to last. Featuring durable rubber bike cradles with integrated anti-sway stabilizers, patented no wobble-no tools hitch tightening system, and a keyed alike locking hitch pin with  8' security cable. Arms fold down when not in use and the racks tilts down for easy cargo door access.