Have been looking at putting winter tyres on my Sportback Sport, running standard 17" Sport wheels. Was thinking would I be better off trying to get some 16" SE wheels or steels even for the winter tyres? Could I go as small as 15" and clear the brakes? On the standard sport suspension would the clearance under the car be greatly effected by reducing the wheel size by 1 or 2 inches? Any advice would be greatly appreciated.