We carry 2 recumbent trikes on aluminum rails above the bed of our 2500HD. I made it out of aluminum channel and use the pickup bed post holes to attach it. Totally removable or installed in about a half hour. Dissasembles into 5 pieces of aluminum less than 8 feet long. We carry the regular diamond frame bikes on a trailer hitch bike rack, that is on the back of the truck or the back of the trailer depending on if we are towing the trailer. Cargo straps are used on all bikes to hold them secure. Really don't like surprizes.