Dunno man...for slammed dually's, I can't imagine going bigger than 24". They already look a little big to me but the look works. 26" 28" sounds dangerously into DONK category. All you slammed guys are gonna start throwing on lift kits and painting Chester Cheetah on the side of your truck.
The brotha in the back seat is pouring a little cheeto out for his dead homey's