A releasable mounting system that includes a mounting assembly and a release assembly attached to a display assembly. The mounting assembly includes a hub assembly having spokes that connect a wheel to the hub, which is mounted to a trunnion. At the intersections of the spokes and wheel are protrusions adapted to mate with corresponding detents arranged radially about the trunnion and formed in a plate against which the hub assembly is positioned. The release assembly includes a release attached to a release plate, the release being movable relative to the plate. A channel formed in the release receives the hub assembly and a hook portion on the release holds the hub assembly in the release until movement of the release causes it to release the hub assembly. The display is pivotable about the trunnion in fixed stops defined by the detents and is also releasable by operating the release.