I have purchased a used 2006 M3 with Stock 19" wheel with Michelin pilots. I also have a 2005 330xi with Dinan S1 perfomance option. I bought 18" BMW rims and Bridgstone RE-01R performance tires. My first question is, will these rims fit the M3, or is the bolt patern and ofset different? And if they won't fit should I stay with the 19" wheels or go to 18" wheels? I have read articles indicating that the 18" would be better for track use. Can anyone help? I have had great luck with the Bridgstones.