Tire Size help

[Major Rhino]

I have a 2wd sport trac and am going to do a TT and shackles lift for about 1.5-2 inches. Can someone tell me the largest tires I will be able to fit without rub or trimming?

 

[Black ST]

15" rims: 32x11.5
16" rim: 285/70

Those are both exactly 31.7" diameters and are about as big as you can get without rubbing issues and they still fill up the wheel well.

 

[Major Rhino]

much appreciated