If you want to go sas that's about the only way to get a big enough tire under your runner to where you wouldn't blow every tire and tweak every rim. I would think 37"+ would be fairly safe with a 20.thanks to the guys with serious responses. To everyone else good thing i give zero f#%@ and your opinion means nothing to me, but hey thanks for wasting your time lol.
Reason i ask is cause i wanna source some tundra 20'' bbs'. I think those would look great on my runner but damn the 5th gen 20's look sick in bigger tires