Mine was a single-wall. It was a bear to get on and off until I figured out a 1-man trick. Back the beast up to an incline that matches the dropped tailgate, climb inside (with bench seat removed), put your back against the inner roof center of gravity, and lift with the legs. Just walk it off. Pretty easy, actually, once all the bolts are off. (Ha, ha.) I had the spare mounted to the roof and only forgot to remove it first once.