I've been running the hot lap bump ups for the last two racedays. I have been really impressed with them. They are still completely glued, and the tread is just beginning to show some wear. And no problem at all with the wheels they are mounted on. For a budget racer like myself 30 bux for four mounted ready to go tires can't be beat. Can't hurt to try them and make your own opinion. I almost didn't buy them b/c somebody told me the tread falls off in a couple runs. Not true at all and I am happy with them.