Fro sale 2012 BIG TEX 14GN-20+5+Center Pop-Up Gooseneck Trailers Options: 2012 BIG TEX 14GN-20+5+Center Pop-Up, The last of its kind. This is a 14GN built like a tandem dually. Dexter 7K axles, 20' flat deck, 5' dovetail, 2 fold flat ramps, center pop up, 8 lug 16" radial tires, twin jacks, lockable tool box,and famous Big Tex quality. Ths trailer has it all.