Ridewell Suspensions RSS-233 trailer suspensions are designed to reduce weight without sacrificing its overall durability. With capacities of 13,200 lbs, these suspensions feature efficient designs that includes a compact mounting envelope to simplify installation. The 233 series 13K suspensions are manufactured with a dual draw key kingpin design to extend kingpin life, feature fully cast axle ends for increased strength and durability, and are the only steerable liftable suspension available with tire inflation, according to the company.