I am a JK owner and my wife has the Liberty. She unfortunately wanted this Jet edition with the 20 in rims. We live in Germany now and we need to have winter or all-season tires to put on it. I would prefer not to swap out tires as seasons change and I would rather take her pretty 20in rims off completely and get some 18in ones off a same year or older Liberty. My only source here for cheap rims is the junk yard, but first, what years would fit, or would they all be the same size? I apologize for my incompetence, I appreciate any assistance.