First post and sorry if the question seems dumb. Picking up some american racing ar 767s, 15x8. I've measured them and I keep getting 4.75" backspacing. Supposedly it has a -12mm offset. If putting 31x10.5x15 has anyone had any trouble with rubbing? I see most people try to run 3.5" to 3.75" backspacing. Think these will look awkward on my truck? Oh and it's a 2005 XLT 4x4.