My Audi A2 1.6 FSI Sport has 17" Rims and 40 section tyres. Needless to say the rife is a little rough, and I suspect with larger section tyres it would probably be better so I thought I might change up when replacing the tyres. Does anybody know the implications - clearly bigger circumference = lower reading on speedo, and might not fit in arch. But, what about handling etc? Any experiences or thoughts welcome