The best way I have found to make a grip imovable is to wrap the bars with a little cloth tape soak it with hairspray. Then jam the grip on as far as you can if it won't go on all the way use an air nozle to blow the grip up kind of like a baloon and jam it the rest of the way on. once the hiar spray dries the grip will never move no matter how ssoft the compound is. a little trick i picked up racing BMX.