I used to carry a 70# sand tube in the hack and then I finally had about 4 sqf of 3/8 steel plate welded into the space between the frame tubes. Works out to about 75# and makes a real nice skid plate also. Now that I have a platfotm there I may work on a set of bolt on wheel stops so I can pull the tub off and carry the Rokon on the sidecar frame instead of pulling the trailer. I will have to come up with a fender for it then also so maybe I will just stick to the trailer.
