My bike club used to have designated fat-tire rides in the winter, which would go as scheduled as long as roads weren't icy. Then, I attended the now-almost-famous Ed Gin seminar on Coroplast fairings and built one for my V-Rex. We didn't have much snow that year, and I got to ride it a lot. Which was 'legal,' since I had a 24x2 tire on the rear. It made the rides much more pleasant, but nobody could keep up with me anymore. As a result, everyone started riding their road bikes on winter rides, which meant no rides at all unless the roads were completely clear.