Time for new tires and I want to go bigger if I can.
 

I have been running Nitto Terra Grapplers on Helo Max 8 20x10 wheels. "Description: Helo Maxx 8 one-piece chrome plated aluminum custom wheels with -12mm Offset, and 5.0" Backspace for lifted trucks". The tires are 325/60r20 and have gone about 60k miles. They have been great. Now that I'm going to replace all 4, I was wondering if I can go bigger without any lifts? The 325/60r20 do rub a little when I back up and turn sharp. Also I dont want to lose any width.