~~P.S.S. With the weight of the boat on a roller trailer, the keel should set on the keel roller; if it does not, you may have to install a keel riser kit. In general, the bigger the boat, the more bunks need to be underneath for support. Once you get the boat on the trailer and set it up for length; make sure there is approximately 50mm of the hull overhanging the last roller. JBT900G | Galvanized Trailer for 12' Jon Boat. On a lightweight boat such as an aluminum jon boat, a pair of bunks (one on each side) are sufficient to handle the load. Order today Order motorcycle trailers, ATV trailers and … ~P.S. The goal is to be at or within about one inch of the trailer bow stop. Aluminum Trailers, Jet Ski Trailers, Pontoon trailers and Skiff Trailers. General. Fits up to a 12FT Jon Boat. 600 LB Capacity Winch with Strap. Optional Side Swivel Tongue Jack Available. Also check that the boat is not sloping downhill or … Online shopping for Guides & Rollers - Boat Trailer Accessories from a great selection at Sports & Outdoors Store. Seapon Pontoon Boat Light, Marine Led Light Strip for Duck Jon Bass Boat Sailboat Kayak, Led Flex Lighting for Boat Deck Light Accent Light Courtesy … 4.80″ x 12″ Galvanized Tire & Wheel Assembly**. The best support for a boat is a bunk system made from boards or planks covered with marine-grade carpet. While loading the boat, you'll know you have the correct trailer depth when there is some resistance between the boat and the trailer bunks. As a note; Self Centering Keel Rollers can help guide your boat into the center and offer greater support to your trailer setup. You should need to apply some throttle to get the boat to drive up the last few feet. Carpeted Bow Support Bunk on all Models. Huge stock ready for delivery. Carpeted 2″ x 4″ x 6' Flat Bunks*. Online shopping for Guides & Rollers - Boat Trailer Accessories from a great selection at Sports & Outdoors Store.