Sorry and thanks for the reply, to be honest, I, and most importantly my Mrs, haven't noticed any significant difference in the cars ride quality and comfort. If any of us had i would have changed the wheels back straight away. I couldn't find any definitive info either way anywhere so I'm drawing to the conclusion that it's just mileage related wear and tear. The ride quality is superb on the the 20's compared to my 16 plate DS 4 on 18's. Go figure that one!🤣🤣🤣