maximum backspacing of 4 inch. I would imagine that is what you are gonna find the most in that size anyhow.
next question is if you have flares or not. An 8 inch wheel with about 3.75bs will come out to the edge fender. Obviously a 10 inch wheel will stick out about 1-1/2-2inches past that.
My 15x10s are 4 inch backspacing and without flares they stick out a good bit.