I studded my own tires by putting screws through from the inside out.
Frostbite can be a problem if you stand still or if it's really windy, but usually not something to really worry about. Not only did I ride to work every day for 3 years, I also went for a walk every single day at lunchtime to get sun on my face. Walking, outside, past -40C is really no problem. The days the wind was blowing from the north and the windchill was past -65C were a different story.
Frostbite can be a problem if you stand still or if it's really windy, but usually not something to really worry about. Not only did I ride to work every day for 3 years, I also went for a walk every single day at lunchtime to get sun on my face. Walking, outside, past -40C is really no problem. The days the wind was blowing from the north and the windchill was past -65C were a different story.