I did do the roughcountry 1.75" level and didn't touch the rear. 285/65/20s will fit with minor rubbing (only in reverse with full wheel lock), I had to use a ⅜ hub centric spacer on the front to clear my upper control arms with the 295/65/20s. I rub at full wheel lock at the mudflaps. I plan on doing the mudflap delete to get rid of that issue. I hope this helps!