Don't know if this helps but I set up my car to work with:
18" by 9" with 245/35R18 Continental Extreme Contact DW on the front
20" by 12" with 335/25R20 Continental Extreme Contact DW on the rear
The final alignment is not done in the attached photo but the rear lower control arms are parallel to the ground which I believe is good for street use and to maintain good geometry.