From the various posts I've read on the topic, 20" wheels on the A5 seem to only be an annoyance in terms of ride comfort when the car has the optional Sport suspension (available in some markets). With the regular A5 suspension, I can tell you from personal experience that 20" wheels on an A5 has a surprisingly comfortable ride. So you need not worry unless you opted for Sport suspension.The car was made for 20" inch alloys as they look stunning on the car but cant help wonder what the ride quality is gona be like since their has been bad reviews in the forum regarding 20" alloys on a A5.