What size tires?
 

I have a 07 Dodge Ram 2500 and i'm looking at going with bigger tires. Does anyone know whats the biggest i can go without any suspension work, and stock rims? Looking for good ideas on tires too i was thinking of Nitto Terra Grapplers. Any comments or help is appreciated.

I think you can get 33s without any lift stuff. Any bigger and you will need a leveling kit. I hear people love the nittos and others wish they never bought them. I personally have no experience with them. I think you will be fine no matter what you choose. They are all made the same, depending on what you are going to use them for respectively, from what I understand. Nittos are more expensive tires though, just a side note. It just boils down to what you want functionally speaking from your tires. Off-road, freeway, a mix of both. Look into it some is my suggestion.

I HAD 35" BFG'S WITHOUT A LEVELING KIT AND THE ONLY PLACE THEY RUBBED WAS THE CONTROL ARM.

+1 You CAN fit 35's with stock suspension. But @ full turn it will rub control arms.

I'm running 315/70's (stock suspension) and they barely rub the control arms at full lock. No fender contact unless you go with after market rims that have less backspacing.