Roadmaster Active Suspension (RAS) has introduced its latest Easy Fit rear leaf spring suspension upgrade. The design improves the performance of the leaf spring system by converting passive leaf spring suspension to mechanical active suspension and adds strength without hardening the ride. It also will improve load carrying and make the vehicle safer, according to RAS. The new kits can be installed in less than 30 minutes and still provide all the benefits of the previous kit, the company said.