When I tried to install some older Style 128 wheels on my 2011 X5, I discovered that the E70 X5 has 74.1 hubs and my spare set of wheels has 72.56 hubs. I checked into having the wheel hubs machined to 74.1, but decided not to go down that route. Then I found these hub adapters online and just ordered them.
I will keep you posted how things work out.

Wheel Spacers, Adapters & Spacer Packages | Mortorsport Hardware#