Well im running final editions. 275 35 20 p zero
Im thinking of 275 40 20
Or 285 40 20
All of which fit. I have used 275 35 on a 8.5j wheel and 285 on the 9j wheels
So il put part worns on next and experiment

Its a LWB any way and not lowered so there is heaps and heaps of arch space