I have decided to fit Michelin Cross Climate tyres to my A5 Cabriolet, but they are not available for 19 inch wheels. My intention is to get a set of after market 17 inch wheels and fit 225/50 R17 98V tyres on the car. This should provide a smoother ride, and has the added attraction that the 17 inch wheels can be used with snow chains, as I spend some time in France during the Winter, where snow chains are required. Has anyone have experience of doing something like this before?