Abstract: A wheel suspension assembly for a trailer comprising a pair of support plates, the upper end portion of each to be attached to a trailer frame, the lower end portions being connected by a fixed pivot pin a substantially rectilinear support frame having its forward end pivotally mounted on said pivot pin and extending rearwardly therefrom under the trailer frame to its end portion where load cushioning means interact between the trailer frame and the end of the support frame. At least one two-wheel-axle assembly is secured to the support frame at a distance from the pivot pin which is one-third of the length of the support frame. The suspension is attached by the support plates to the trailer frame at a point so that the centerline of the wheel assembly is under the center of the longitudinal axis of the trailer frame.