After reading a lot of threads on wheels spacers on this site and other forums i have come to learn that they arent to safe to have on your vehicle and i have seen many people say that instead of using spacers you should use negative offset rims because they wont wear out your bearings. but wont a negative offset rim put the same stress on your bearing that a spacer would, since both work the same way to move the tire farther away from the vehicle? please correct me if im wrong ive been wondering about this. thanks for the help! 
