I drive a Lupo 3L TDI in Sweden. Here we have to change to "winter tyres" between November and April. My standard summer tyres are 155 / 65 / 14 R but my winter tyres are 165 / 65 / 14 R. they came with the car when it was imported from Germany. What Tyre / Wheel size range does the Lupo 3L have ? In other words, what are the biggest wheel / tyre size I could legally drive with??