I have a 2011 red wrangler sport 4x4. Its a basic model and im looking to change the wheels out with Eagle Alloy 197 wheels in the super finish (black/chrome). What is the biggest wheel I can go to without putting a liftkit on my jeep and also when im selecting the wheel it asks for which off set i would like either REV or RWD. Wich off set do i pick? Thanks for any of help guys!