I have the 20" OEM 214 wheels WITH the extended wheel arches. What is the ideal spacer set-up for the front and rear? Does anyone have this set-up that's using spacers too?

I'm thinking 10mm for the Front and 15mm for the rear????

Thanks a bunch!

__________________
Current Garage:
2015 Singapore Grey M6 Gran Coupe (ED - May 2014) -new car
2008 Imola Red E60 M5 - love of my life
2012 Alpine White LCI E70 X5 50i w/ LCI Aero Kit and Rocker Panels - wife and kids car

Retired:
2009 Jet Black E70 X5 4.8i Sport w/ Aero Kit
2007 Jet Black E60 530xi M Sport
2003 Jet Black E39 530i Sport