What are the biggest size tires that can be put on an 09 brute force 750i with a 2" lift?

So this might seem like a simple question but i think the dealer I am buying my brute force from is trying to screw me over so before i head back up there i wanted to make sure this could be done. I wanted 28" mudlites with a 2 inch lift but the dealer is trying to tell me 28" wont fit and neither will 27". Supposdly they rub in the back. How this is exactly i dont know. just wanted see if anyone else had this problem.

 

I see this is a old post but I'm new on here and I will answer this in case other people need to know. I have the 2005 BF and I'm running 29.5 outlaws on ITP type 7 rims with no lift kit. I do have to run spring preload on highest setting. As long as you don't jump it or hit bumps at high speeds , You won't have rubbing problems. Hope this helps.