Like mentioned earlier in this post, offset and tire size are the most crucial factors in determining whether a tire will rub or not. In you particular setup with the tires you are running, you need at least a +40mm offset to kill some rubbing. I have a set of 20" wheels that do not rub when the car is dropped 2 inches, yet the tire width is 225mm and the wheels offset is +35mm
.
Just make those two factors work together, and yo can make magic happen
.
