I'm in the process of building up a single speed fixed gear. It'll be completed fairly soon. The problem is that I live in Colorado, at about 9,000ft., i.e. the streets are usually snow packed. I was considering putting some cyclocross tires on the bike. Does anyone have any suggestions for a tire that is particularly good in the snow? I have noticed that Nashbar sells a 700c studded snow tire. Are these worth the money, or the added weight? Finally, how do I check to make sure that my frame, and brake will accomodate a larger nobby tire?