I won't be switching and I live in the NE of Scotland. Previously owned a 3 series running on 18" wheels with low profile summer tyres and was even able to get about in that except for the days it was really bad snow. Winter tyres will always sound like a good investment from the marketing but while it's not law in the uk I ll keep the money and stick with my 309s and summer tyres. If the weather is really bad then the police usually tell you not to travel and therefore work from home.
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