I have a 2008 Tacoma Double-Cab V6 Auto-5-speed, short-bed, with a factory tow-package (Class IV). I would like to use a motorcycle carrier supported solely from the hitch. But one of the large manufacturers of these carriers tells me that I'm limited to only 280 pounds of carrying capacity (due to the "leverage"). Actually, it's not a limitation on the carrier itself, but on the truck. The carrier manufacturer states that their carriers would place too much torque on my truck, via the hitch. My bike weighs 350 pounds dry; but I would like to carry a 550-pound bike occasionally.
Does anyone have any knowledge about this, or data to the contrary?