I have a second set of wheels. During the Summer they have off-road tires on them, during the Winter they have studded tires so I can swap at moment's notice in the morning. If it was wet the day before and now it's below 0C, I "wear" studded because there will be ice all over. I also use studded in snow, because they're also fat and knobby so they're better for snow than my slicks, even though studs don't do much for fresh snow.