Be sure to check the trailer specs of your new enclosed cargo trailer before coming to pick it up so you know you'll be able to drive off with your new trailer straight away. For reference, our 6x12SA Trailers use a standard 2" coupler and most of our other trailers use a 2 5/16" coupler. If you've chosen a Gooseneck trailer, you'll need a 5/16" hitch already installed in your truck.