The duals stuck hard on our Ford. Took me quite a pounding to get them loose. The fronts were "sticky" and the outer rears were "stuck" but the inner rears were like "attached." I had a 3-ft piece of 4x8 post that I was able to batter the edge of the rim and tire with. Took about 10 minutes a wheel for the two inners. We have steel wheels and there's a 7/16" hole between one pair of lug holes. I threaded each of those holes in all 7 wheels with 1/2" fine (20-pitch) thread, which matches small trailer lug bolts. Using a lug bolt and wrench, I can force a stuck wheel loose if this happens in the future.