HAULMAAX® vocational rear suspension system is available with Progressive Load Spring (PLS). Working in concert with bolster springs in Vari-Rate™ Spring system, elastomeric spring optimizes ride quality in loaded and unloaded conditions. As payload increases, spring further engages and functions together with rubber bolster springs to provide additional stability. Constant engagement also eliminates need for shim adjustments for most applications.
This story is related to the following:Materials and Material ProcessingBus, Trailer & Truck Suspensions | Truck Springs |