I'm choosing widen my fenders instead of tubbing them. I think if I go 2" ish I can get an 11.5" tire in it. I think that is a dividing line in some classes. I'm also making inner fenders for the rear using an old set of fenders. You don't want a tire coming apart at 160 mph and messing up the painted fender.

Old enough to know better, too young to resist.