The DURA-FLEX rubber torsion suspension system is a torsion arm type suspension which is completely self contained within the axle tube. It attaches directly to the trailer frame using brackets which are an integral part of the axle assembly.
The wheel/hub spindle is attached to a lever, called the torsion arm, which is fastened to the rubber encased bar. As load is applied, the bar rotates causing a rolling/compressive resistance in the rubber cords. This action provides the same functions as conventional sprung axles with several operating advantages including independent suspension.
Except for periodic inspection of the fasteners used to attach the DURA-FLEX axle to the vehicle frame, no other suspension maintenance is required on DURA-FLEX axles.