I filled up the air bags (18 lbs on pass. side, 30 lbs on drivers side) and I have about 27.5" from ground to lip of fender flare. Tires don't rub now. I had the d/s airbag blow a hole in it on a seam. Instructions say you can go up to 35 psi, I had about 30 psi. I called Airlift and they sent me a new one for free. The person I spoke with said to send back my old one as he wanted to look at it. He even sent me a Fedex return shipping label.