To figure the height you need back your truck under your camper and lower the camper to the desired height from your bed (6-8 inches from the edge of your bed to the camper is recommended). Then measure from the top of the ball to the flat part of the king pin box and match to the measurements below to find the right fit for your setup.
8″ Adapter Hitch – Height from top of ball to top of mounting plate is 7 inches.
12″ Adapter Hitch – Height from top of ball to top of mounting plate is 11 inches.
15″ Adapter Hitch – Height from top of ball to top of mounting plate is 14 inches.
17″ Adapter Hitch – Height from top of ball to top of mounting plate is 16 inches.
