I'm running an 18x9 et45 with a 255/35r18 on stock suspension Right now and have a little room left. The close spot is the fill neck on the back passenger Side. I would say you would be close to good if you wasn too low. How much drop do you have on the springs?
dam those tires are thiccc boy lol. it's perfectly flush right now at KW's recommended specs. I guess I can always adjust the height, but wanted to make sure there isn't going to be any issues turning the wheel, rubbing, etc., especially cause it's getting wider. this is my first time switching different size tires from factory so I'm not too sure how much of a work it is, but from what I'm seeing on other posts it's worth it switching to 18s.