Customers often ask me for a solution to helping keep the bow of the boat straight and protected on their trailer. A simple solution to this is to change the bow roller on your boat trailer from the standard black bow roller to a Dunbier Poly Bow Roller. These rollers are a ‘like for like’ replacement in both a 75mm and 100mm width for the winch carriers. The have larger wings on the sides creating a nice ‘V’ that helps keep the bow of the boat centered on your boat trailer.