without touching the guards about 9.5 is the max rim width with the correct offset in a 19, maybe a p35 18x10 will just fit at stock height, if its been lowered you will need to correct the rear camber or the tire/mag edge can easily touch the rear shox body, you can fit 255 maybe a 265 depends on diameter and profile, the max diameter I found is 255/40/19 or it will rub on everything 255/35 265/35 are better clearances, the rears the problem not the front, and this is from mucking about with a 260rs.... standard stags apparently have a different rear track?? westybob will know how different the rear sub-frames are as I think he put a gtr rear frame in his rb30 wagon?