Hi folks-- I'm doing my first HDPE event soon. My rear tires are down to the wear bars in the center, but there's still some tread left. Is this going to make the car fail the tech check? Is it stupid for me to try and run with these tires in any case? I was thinking that getting new tires at this point would make the rear more slippery, just from the new tire "molding material" or whatever. Any thoughts, should I get new tires or not.