... type for the larger boats.Boat supports on the trailer are also with various choices of single roller, ... multi-rollers, skid, etc. Trailer parts are also availableTyre, brakehydraulic/mechanical; drum/disc, hub, ... axle, leaf spring, coupler, winch post with bracket, hitch ball, draw bar, safety chain, jack wheel, cross beam, and other accessories . OEM Boat trailer ...