I have a 06 fx4, and I want to put bigger tires on it. I have added the 2.5" leveling kit up front, and a add a leaf in the rear. I plan on using the stock rims. I want to put the biggest tires I can on those rims without rubbing.

 

if you dont want any rubbing; 33x12.5R18 (or 20)

if you dont mind a little rubbing, 35x12.5' will fit great- see my gallery for both 33's on stock and 35's on stock

 

Thank You !!!

 

I agree with BalogUK.