Abstract: A suspension system for a trailer in which the trailer has a structural member running along each opposed side thereof, the suspension system having a shaft rotatably supported to each of the structural members, the shafts extending in a common axis opposite to each other, a rocker plate affixed to each of the shafts in a plane parallel to and spaced from the trailer structural member, each rocker plate having a recess in each end, a pair of rocker arms for each rocker plate, the inner ends of each rocker arm being pivotally received in a recess in the rocker plate whereby the rocker arms extend away from each other and in a common plane with the rocker plate to which they are attached, an elongated leaf spring supported above each of the rocker plates, the longitudinal center of each spring being supported to the rocker plate below it, a shackle pivotally connected to each end of the spring above each rocker plate and to a point spaced from the outer end of each rocker arm, and an axle affixed to each rocker