You'll probably need at least 1" of bump stop spacer in front with those beasts and 2" in the rear 4 sure! I thought I had enough space after doing a quick measure but in reality on full stuff my 315 AT's rub the inside wheel well with about 1/2" of shock travel left in the front(1" spring spacer, 1/4" wheel spacer and no bump stop spacer). In the rear at full stuff WITH 2" bump stop spacers and 1/4" wheel spacers (no spring spacer)I have millimeters to spare from the wheel well AND frame (think about the angle when one side is drooped and one is stuffed, the stuffed tire angles into the frame). Looking good!
