So I'm going to class last friday, and my screen is saying tire pressure low. So i go to put air in it, I can feel the air blowing back in my face, and sure enough there was a nice clean long cut in the side of my tire. My beautiful 18's. I just had my tire replaced yesterday. I have the 18" Continental SportContact 2. $192 plus $40 for installation. Was not a fun week driving around with the ghetto spare on it.