Abstract: The device includes, at each end of rear axle, an approximately vertical beam, whose lower end is fastened to the axle, and in which is mounted, with insertion of a bearing; a shaft passing through the beam, oriented parallel to the axle, to whose outside end is fastened a first arm on which is mounted the steering knuckle and wheel hub unit and, to whose inside end is fastened a second arm equipped with an assembly for locking in road position, a roller for supporting the vehicle rear on frame in the lowered position and on which is pivoted the end of a rod of a cylinder whose body is pivoted close to the upper end of beam. The shaft carrying the two arms and the pivot pin of cylinder on the second arm is offset lengthwise relative to the wheel axis. The present invention has application to equipping vehicles with front-wheel drive and rigid rear axle with blade suspension.