How did you fit 11.5s? Are those the bamf cf flares? They look like the msa ones. i have 17x10.5 on there right now and i have about 1/4 inch of room between the tire and the inner fender so i couldnt possible have any better backspacing. I called John the other day and he is gonna send me some 3.5" lips so they will be 17x11. I think this will completely fill the gap, but if im wrong i would like to know before he sends them out. Do you have any pics of the rear fender flare vs rim width?
BTW I love your gas cap, send pics of that too.