I need to replace 8 wobble rollers (the whole set on the tail), black rubber type, 4" on a 3/4"spindle on the trailer-shorelander trailer. At least 2 of them on the tail of the trailer are split with a metal piece popping through or almost through. This type of roller has metal sleeve/bushings, metal washers and cotter pins through the spindles. <br /><br />will these be hard to replace and is there any way to do it without floating the boat? I could float it and work on the rollers in the parking lot if it isn't too big of a deal. I have seen several posts refer to hog rings on rollers- what is that? Thanks.<br /><br />Joe