With stock 20's with 325/60/20 on 05 1500 4x4 with 2.5 level kit you have a slight rub. Every post and sticky everyone jumps to saying you need spacers of 1.0" or 1.5" but which is it? I would like to be wide enough to fill bushwacker pocket style fender flares. Other option is new rims, but what is the back spacing needed for no rubbing? Everyone states spacer's or back spacing, but nobody is specific on what is needed? Any help would be great as I am sure I am not the only one who has been reading posts for a day and a half.

 

Well, for starters that's 2" wider than the factory 275/6020 tire. Running in at 12.8" wide. Also, the tire is almost 35.5" tall.
I would have to say that you need atleast the 1.5" spacers.

 

I thought the title was a typo, guess not. I thought that might be a little too big for the stock 20's.