Not sure about Intrax ride height, but I'm running ST's in rear on stock size wheels and tires (27"). The rear sits at 25 1/2" pavement to center of wheel well. I would NOT want to be any lower because rubbing issues would follow. If you go with ST's in rear make sure you have lowering springs in front that match or the car will look as if it's dragging a load all the time. So far, I'm very happy with the ST springs in front and rear.