Anyone running 15x10s on the back of a stock duster??

Your correct, The tread portion is aprox 1" inside the top of wheel well with the sidewall is aprox 1" outside the top of wheel well. There is no rubbing.
Tread is 11.5 & side wall width is 13.50 This is a 28" tire with aprox 3/4" space between the front of tire & wheel well edge. Some guys have moved the axle back 1" to center the front to back of the tire to the well.