Abstract: A vehicle suspension system includes a modified wheel structure including an outer rim rotating upon an inner member formed substantially as a hollow cylindrical drum on an outer surface of which the rim is mounted on bearings provided between the outer surface and the inner surface of the rim. A suspension arm from the vehicle frame projects from the vehicle frame into the hollow drum for pivotal movement of the wheel relative to the suspension arm about a horizontal axis which lies substantially in the vertical central plane of the wheel. In a steering system, the suspension arm connects with a cap mounted on a post at the bottom of the inner member with a hydraulic motor driving rotation of the inner member relative to the cap for a steering action. The drive system to the wheel is transmitted through an open inner face of the drum through a hole in an outer face of the drum to a drive disc mounted on the outer face and communicating radially outwardly to the outwardly facing edge of the rim member.