A suspension unit is disclosed having a hanger having a front face with an aperture and a control arm having a front face with an aperture. The control arm is pivotally attached to and depends from the hanger such that the front face of the hanger and the front face of the control arm are opposed one another with the aperture on the front face of the hanger being aligned with the aperture on the front face of the control arm. A jounce spring and a rebound spring are coaxially mounted to a shaft. The shaft is mounted through the apertures and springs. The rebound spring is positioned between the front faces of the hanger and the control arm and the jounce spring is positioned horizontally to one side of both the hanger and the control arm with the shaft in a horizontal orientation.

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