I've commuted year round in Portland and know how to deal with rain, but I'll be moving to Michigan this December. How bad is the road salt on your bikes? Am I going to want to pick up a cheap used MTB and just let it rust out? What are your experiences with corrosion?
Also, how necessary are studded tires for the winter commute? Seems like some people swear by them, and others get by fine without. If you have a set of both, each on their own wheel sets, what criteria do you use to determine which one you'll use for the day?
Thanks for the input.