I did and it made the car loose in the rear on power. The track right now has alot of pollen that did not get washed off with all the rain we have had. The track owner uses trackbite. I blow the the track off when P2 is not around. That is what I have been using since I have alot of theose tires from running the race that David beat my arse in. I just use them to use them. I was just saying that is I was getting out of them. I hate to see good things sit for along time, like tires, and not get used. I especially kringe when I cut them down to a smaller size seeing all that rubber go down the trash can( or shall it be a waste of money).