i was having some problems with them coming off sometimes ..i.realized part of the problem was the grousers were a bit wider than my tires and with the higher lugs on the tires they did'nt come down on the sidewalls far enough . so i ordered some 1 1/2 x 1/4'' white delrin flat bar . cut pieces longer and fastened to the insides of the grousers . they took up the space and go down further on the tires . so far it's made a big difference . johnboy