No problems here 285/60/18s. I've been off-roading with them and had NO clearance problems at all (just the minor trim on the front). They did a great job, only got stuck once in a nasty mud hole where I bottomed out. I have a picture of the "other side" of this shot if you want to see how they have plenty of room even inside the wheel well.

http://www.vehicross.info/gallery/da...x-mud-flex.jpg

Jay