I have gone for 9'x20" fronts & 10.5"x20" rears. I am going to run 295x25 on the rear as to not over step the radius of tyre to much and put the speedo out. Calculation on speedo with 295's will be around 62.5mph when speedo is showing 60mph.
Fronts I am going for 255x30, I don't want to go to wide on the fronts otherwise to much tracking will occur.
I have heard that you can go 9.5" fronts & 11" rears and run 315's on the rears but radius would put your speedo way out.
X5 F15 M50d White, 20"rims, Yellow Calipers, Ceramic Pads. Better off saying what it does not have and that's a B&O Audio System, otherwise all option boxes are ticked.