Hi Folks. New here..........

I was hoping some of you could help me out with this one. I have a 2005 Dodge Ram 2500 w/Cummins Diesel and 8 foot bed. The tires are factory and ready to replace now. I would like to know what would be the largest tires I can upgrade to without having to lift my truck. I would like to get something with some aggressive tread yet still rides nice on the road. Tired of these little skins that came with the truck.....time for a change.

I would greatly appreciate some help.

MCD