To repeat, copped from this Board, lifted from another Board, (Hey, it's the Net!
) :
X3 E83 = PCD 5x120,
center bore 72.5mm and M14x1.5 bolt thread. ET 40-45
X5 E53 = PCD 5x120,
center bore 72.5mm and M14x1.5 bolt thread. ET 40-45
X5 E70 = PCD 5x120,
center bore 74.0mm and M14x1.25 bolt thread. ET 37-53
X6 E71 = PCD 5x120,
center bore FRONT 74.0mm, center bore REAR 72.5mm and M14x1.5 bolt thread.