Keel rollers support the boat along its keel line and carry much of the load on the trailer. Viking Rollers supplies keel rollers in every material: soft red poly for fibreglass, hard blue nylon for alloy, and black rubber as the all-rounder, in 4 inch, 4.5 inch, 6 inch and 8 inch lengths with common 17mm and 21mm bores, plus keel rollers with alloy centres and matching V-blocks. We supply the trade Australia-wide on a quote basis. See the roller selection guide to match material and size, browse roller mounts and brackets, or request a quote.