I Have a 2000 Foreman 450 S what is the biggest mud Tires that will fit on my stock wheels and suspension with out rubbing also what size and tire is the best all around mud/Trail tire for my stock wheels i am considering Vampires or BIClaw/Triclaws or outlaws or Jackals

 

A friend of mine has 27 inch Titan 589's on his stock wheels (98 450S) and it doesn't seem to rub. He does not have a lift kit either. I think they are 27x12x12 rear and 27x9.5x12 front (could be 27x10x12, they only make one or the other).