Tire - Wheel Question

I was thinking of having two sets of tires/rims. One for regular driving and a set of top of the line off road. I drive on Lava beds and they tear up the regular tires. I have the standard jeep 225/70-16. I'm having a hard time finding basic rims, seems like everything out there is chrome and spinners!

I also wanted to find out if I can use bigger rims or if I'm stuck with the standard. New to off roading so anything is a help.

I would go with some cheap pepboy rims black rockcrawlers. That way you can replace them as need if you hardcore 4-wheel! I have had mine on for 2 years and now I leave them on and sold the street wheels. These really make a jeep look like ajeep. You could go to quadratec and order them also.

First I heard of Quadratec. Thanks for the heads up. Gotta love this site!