I dunno if I'd trust anything but studded tires for my winter commute, although I suppose running one of those TC Winters on the rear wheel might be okay. Besides, if I'm gonna spring for a second set of tires for winter cycling, and the TCs cost 60 bucks apiece anyway (http://www.slanecycles.com/continent...D&delivery=223), why not get some studs? I suppose if I lived in an area which rarely saw ice they would do, but I wouldn't chance it around here.