The Galvanised Trailer Leaf Slipper Spring provides reliable suspension performance for boat trailers, absorbing road shock and maintaining stable load distribution across the axle during towing. The 4-leaf configuration delivers a higher spring rate than a 3-leaf unit, making it suited to heavier trailer and vessel combinations requiring additional load capacity. The slipper end design allows the correct controlled suspension travel as the spring flexes, whilst the galvanised finish provides essential corrosion resistance for trailer components regularly exposed to water.Galvanised Trailer Leaf Slipper Spring 4 Leaf - Trailer Parts 4-Leaf Configuration - four-leaf stack providing an increased spring rate suited to heavier trailer and vessel combinations requiring additional load-carrying capacity Slipper End Design - free-sliding slipper end enabling correct controlled suspension travel as the spring flexes under load during towing Galvanised Finish - corrosion-resistant coating protecting the spring from water and salt exposure encountered during regular boat launching and retrieval