The Ridewell Steerable Auxiliary Lift Axle Suspension System, No. RSS-233, includes a compact mounting envelope and an easy-mount adjustable-hanger system. RSS-233 suspensions are manufactured with a dual-draw key kingpin design to extend kingpin life and fully-cast axle ends for increased strength and durability. Additional features include 7" to 18" ride heights, a 13,200-lb capacity, a pre-plumbed air tank option, polyurethane pivot bushings, 1'' and 2'' spacer kit options and control arms angled for lateral stability. The RSS-233 ships fully-assembled for efficient installation.