I recently purchased a Ram 5500 chassis cab with crew cab and 60" CA frame length. On the rear is a 9' Palfinger Badger flat bed with a Curt Double Lock 30K lb gooseneck and dual 40" DeeZee under bed storage boxes. Off the rear of the truck is a SuperHitch Magnum 20K lb dual receiver.
The gooseneck did not cost that much when I ordered the bed and is for future towing needs if we go away from truck campers. Currently I have Arctic Fox 811 that is sitting 7.5' on to the deck because it was designed for a short bed pickup. The front to rear center of gravity is almost perfectly aligned with the rear axle and there is still about 1.5' hanging off the rear of the deck (this where the bumper supports, generator exhaust and drains for sewer and low level are located). The SuperHitch is designed to take double trussed extensions up to 5' long, but the rating of the receiver is dropped to 10K lbs (under 4' @ 12K and under 2' @ 14K). I run the 14k lb 2' SuperTruss to a 10K WDH so I can tow a 20' enclosed trailer that can weigh 5000-8000 lbs based on what we load up. The entire combination length is 48'.
