An assembly for movably supporting a wheel on a frame of a house trailer has a torsion bar extending horizontally perpendicular to the normal horizontal transport direction of the trailer, with the inner bar end being anchored to the trailer frame and the outer bar end being limitedly elastically pivotal about the bar axis relative to the inner bar end. An arm extends generally perpendicular to the bar axis and generally in the transport direction, and has an inner arm end fixed to the outer bar end and an outer arm end. This arm is formed of a piece of flexible steel plate lying in a vertical plane parallel to the normal transport direction so as to be substantially inflexible angularly of the bar axis between the arm ends and relatively flexible parallel to the bar axis between the arm ends. A substantially rigid and inflexible wheel-support strut has an outer strut end connected to the outer arm end and an inner strut end mounted by means of a bearing on the frame for pivoting of the strut about a strut axis skew to the bar axis and passing through the inner strut end. The outer strut and outer arm ends carry a wheel that is rotatable about a wheel axis substantially parallel to the bar axis. As the strut pivots about the strut axis the bar will twist about the bar axis and the arm will deform parallel to the bar and wheel axes between the outer strut and bar ends.