So guy so that I have a better understanding, currently my car has 19"s with 255/50-19 and I am switching to the staggered 20" setup with 20x10 275/40-20F and 20x11 315/35-20R.

I don't want to put run flats on the 20"s and don't mine putting one of the 19"s in the truck to used as a spare on long trips but I have heard due to the awd this will not work

Is that the case as if so I will just get run flats for the 20s but I just see better tires which are non run flats and also at better prices too.