Most Road King Trailers are equipped with the “posi lube” bearing lubrication system. We suggest each time before towing to simply remove the grommet from the bearing dust cap and fill with a lithium based marine grease with a grease gun. If excessive grinding sound comes from the hubs, have the bearings and all internal parts replaced by a qualified trailer repair center before towing. We also offer “vortex” or “rock solid” hub units. They offer a “no touch” lubrication system. No need for re-greasing, inspection, maintenance or service for lower operating costs. The dust cap is threaded and reusable for easy removal should the need occur. Bearing Sizes: 4 Lug Hubs: Same inside & out: bearing 1 1/16” #L44649, bearing cup #L44610, seal # 125255GT 5 Lug Hubs: bearing(outside) 1 1/16” #L44649, bearing(inside) 1 3/8” #L68149, bearing cup(outside) #L44610, bearing cup (inside) #L68111, seal # 171255UC 6 Lug Hubs: bearing(outside) 1 1/4” #15123, bearing(inside) 1 3/4” #25580, bearing cup(outside) #15245, bearing cup (inside) #25520, seal #225255UC
