Which winter tyres for Ford Focus? My wife and I have just bought a 2010 Ford Focus 1.8 petrol. It will be used as our general workhorse during the summer, but will also be used to take us to our winter home in the French Alps. While there it will be kept in an underground car park, but used occasionally for shopping trips to the valley below. As we intend to keep the car for many years, we are thinking of buying a spare set of wheels and winter tyres and my query concerns sizes. At the moment the car has 205/50 R17 tyres and the alloy wheels are fastened with five studs. Would it be possible to buy 16-inch wheels for the winter tyres and, if so, which tyres should we buy? You could buy 205/50 winter tyres, but I'd go for 15-inch steel rims and a set of 195/65 R15s. They will work slightly better in winter and will also be cheaper than the 16-inch equivalent. If you go for the 15s, it counts as a "modification" and needs to be declared to your insurer. If there is any penalty for this, change your insurer (assuming, of course, that you can get a cheaper quote elsewhere).