I don't commute in the winter. It's not that we have a lot of snow here in New York, but the cold makes it too much of a hassle and a hazard.

Bundling up in layers of thermals and jackets is not worth the fifteen-minute ride. And the risk of being shuffleboarded off the road by a driver whose windshield is not yet defrosted is just too serious.

HOWEVER, I have always been intrigued by those studded tires and would LOVE to try a set for recreational riding during the winter. Are they expensive? And can I make my own set from an extra pair of MTB knobby tires?