Okay here is teh wheel I have decided on for my 06 550i Sport. The manufacturer says that the 20x8.5 front has a 20mm Backspacing, and the 20x10 rear has a 30mm Backspacing. Does this sound right? I have read many other wheels in this staggered size has a 20mm Backspacing front and rear. They say they use that backspacing on tons of BMW applications, but I dont trust a salesmen.

 

I had those genovese's in black, I think the offset was 20 all around. 30 is way too big. Huge lips too PM me and lemme know how much your paying if you dont mind

 

$1350 out the door (Locally) for 20x8.5 and 20x10. The manufacturer said this is the offset they use for all BMW e60 applications. I used the offset calulator and it appears that 30mm is acutally a perfect offset for the rear to avoid any tire rubbing. 20mm would push the wheel out 6mm from stock, wehre as 30mm insets it 4mm. 4mm is not going to be noticable, and it will avoid rubbing much better.