TSL's photo says it all. I ride year round and use studded tires as well. They don't make much difference in deep snow, but on packed snow and ice, they make a positive difference. This is the kind of stuff on which I ride with them.
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A conclusion is the place where you got tired of thinking. - S. Wright
Favorite rides in the stable: Indy Fab CJ Ti - Colnago MXL - S-Works Roubaix - Habanero Team Issue - Jamis Eclipse carbon/831