Could this be the replacement for traditional leaf-spring suspension?
When it buckles down to the business end of caravan construction, one of the most important elements is the suspension. The Cruisemaster GT is designed for the highway, with low unsprung mass that aims to give towing stability and control and more importantly, comfort and effortless touring. Easy to install and maintain, the Cruisemaster GT has been designed, tested and manufactured in Australia packing a two-year manufacturer’s warranty in case you experience any issues.
For more information: http://www.vehiclecomponents.com.au/suspensions/cruisemaster-gt/