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Old 04-21-2013, 10:43 PM
spadae2 spadae2 is offline
Officially Welcomed to the 'Fest
Location: Glenmont, NY
 
Join Date: Jan 2011
Posts: 144
Mein Auto: 2013 550i xDrive
Just use BMW spec. For BMW wheels 245/35/20 F - 8.5J, 275/30/20 R - 9J. Which has a rolling diameter of 25.5 and 25.8 {tire manufactures will vary}. If you purchase aftermarket wheels you can buy 9.5J for the rear and use 285/30/20 which have the same rolling diameter as the front. But I can tell you from my experience with Porsche, use the factory specs for wheel width and sizes. They did not just make them up. If you look in the F10 manual you will see these under the factory sizes as an option.

I had a 2010 750ixL Exclusive, with also ran a 20" Factory staggered setup with DINAN Stage 1 without issue.
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