Stepside Tire/Wheel Size?

[mikej71]

I was wondering if anyone knows if you can get a 15x10 w/ 295/50/15 tires on the rear of a stepside? I currently have 8" truck rallyes w/ 275/60/15s, and they sit a little inside the wheel arch, but they're pretty close to rubbing on the backside. I believe that the rallyes have 4" backspacing, so that pretty much tells me that it would be hard to fit a 10" wheel without it sticking out. Also, what is the most backspacing that anyone has been able to use?

Thanks a lot,

Mike