Very important: also have the maximum axle capacities and know how much weight can be added on top of how you'll normally load it. The bars will shift some weight from rear to front axles.They key word is "not advised". If it set up correctly its all good. Call E-Trailer and have all your info in hand on trailer tongue weight(fully loaded ready to travel), trailer weight, and tow hitch max capacity.
Your trucks trailer hitch must be weight distribution approved. There should be a sticker on the hitch that has the info. Happy trails.