I recently got a 2011 XLT and was wondering what the largest rim/tire size I can put on without having to worry about rubbing?

I'm relatively new to this sort of thing so any help is appreciated. Thanks!

 

It depends on how much backspacing your new rims have. If they stick out wider than the stock wheels, then you can't go any larger tire, as it will rub when you turn. With the stock wheels, you might be able to go a little larger tire, but I would not go over one size or you will rub when you turn.