I was hoping for some guidance on the optimum tire size. I have an e63 s that has HRE's with 20x9 ET 35 in the front and 20x10.5 ET 50 in the rear. It is lowered with Renntech coil adjusters in the front and links in the rear, so I have some adjustability. I wanted to run a 295/30/20 rear and 265/30/20 front, but I am not sure if that will work with an AWD. Other options include maybe 305/25/20 rear and 255/30/20 front. I was hoping to run a 30 series in the rear though as our California roads are terrible and the extra sidewall helps. Any help would be appreciated.