Fore and aft load (up to 350 lb.) is transmitted to the unsprung portion of the frame via two painted steel stress members. An intermediate brace connected to the exhaust systems hanger bracket controls sway, while chromed vertical supports handle tongue weight (up to 30 lb.). Works with all the major H-D accessories except the rear dresser bar, OEM #49158-89. Does not work with fringe saddlebags, OEM #90860-86.