I've got 17" x 8" with 215s with no rubbing at all. *see sig*
Some people seem to have 225s with a little rub but not enough to get worried about. 215s are safe though. I imagine correct offset can make all the difference too, especially when cutting it close in size.

Some people seem to have 225s with a little rub but not enough to get worried about. 215s are safe though. I imagine correct offset can make all the difference too, especially when cutting it close in size.