Originally Posted by LostSol

It depends on the tire. I have an 11" rear with 305 Hankook V12s and im at around -2 in the rear but would be fine with less. Hucky on the other hand has the same size rears but with 305 PSS' which have much wider actual tread, and id say -2, maybe -1.5 is the lowest he will be able to go.