[rmorin49]

Bigger wheels usually means more unspring weight = lower acceleration. The ride will also deteriorate in most cases. BMW, like most manufacturers spends a lot of time designing their cars to perform with the wheel and tire packages offered by the factory. In my younger days I would often install larger wheels and tires. Now in my golden years I have realized that the engineers who design these cars know more than I do and I stick with the OEM sizes in both wheels and tires. Just my 2 cents, do whatever makes you happy.