I have 26/12 rear and 26/9 in the front. The first set of wheels were 4+3 and with the 12 inch rear tire i was at 53, the set I have now are susposed to be a 5+2 but measure like 4 and 1/2, but now right at 50.5 in the rear. I didn't have a choice about using the stock wheels or I would have, mine were damaged. A buddy of mine has a 06 650 with 12 wide mud lites and he rubs exhaust and gas tank.