our last two winters have been bad enough that I rode my fat bike a lot. With studded tires. And before and after that, I was riding my regular 26" commuter with a studded tire on the front. Probably didn't need it many days, but around here we might get ice for the evening commute when the morning looks good. In fact, that's a really common pattern. I have a wheel with a studded tire for the back, but I just didn't put it on last year because the fat bike got me through the worst of winter.