Just been reading Autocar online, stumbled on an interesting blog about the 1M' 19" standard wheels being swapped for 18" winter wheels and the ride being transformed......
http://www.autocar.co.uk/blogs/whyilove/archive/2012/01/02/winter-tyres-not-just-great-in-winter.aspx
http://www.autocar.co.uk/blogs/whyilove/archive/2012/01/02/winter-tyres-not-just-great-in-winter.aspx