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The PopUp Kingpin to 2-5/16 Inch Gooseneck Ball Adapter lets a fifth-wheel hitch pull a gooseneck trailer. The kingpin side locks into a standard 2-inch fifth-wheel jaw and the top carries a 2-5/16-inch ball, so one truck hitch handles both trailer types. It is zinc plated for corrosion resistance and made in the USA. It suits owners with a fifth-wheel hitch who occasionally tow a gooseneck trailer and want to skip a dedicated gooseneck hitch. Rivals in this class are mostly imported steel adapters; this one leans on US manufacturing and a plated finish rather than extra features.
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Lowest price we've seen: $148.12 on Nov 9 at TWIST. Tracked across 3 stores since Nov 9.
Owner feedback on this class of adapter is mixed. People like the one-hitch convenience and the plated finish, but some report slop in the kingpin jaw and extra height at the coupling.
This adapter converts a 5th wheel hitch to a gooseneck ball connection. It lets a gooseneck trailer with a 2-5/16 inch coupler be towed with a 5th wheel hitch. It fits a standard 2 inch kingpin and a 2-5/16 inch ball. It can also be used on semi/tractor trailer 5th wheel hitches.
The adapter has a zinc plated finish and is made in the USA. The main coupler tube height on the gooseneck trailer may need to be adjusted so the trailer rides level when towing.