Ok, I'm sorry, I am totally new to this. Maybe I'm making this harder than it really is. I did a search and learned a lot, but I'm still a little confused. I have a 2008 Trek 3700. I bought it for commuting/winter riding. I want to get another pair of wheels and tires for it, ie. studded snow tires, and maybe later on some less aggressive street tires for the summer. I want to be able to quickly switch out the wheel/tire assembly depending on the weather and terrain.
The rim has a freewheel not a freehub/cassette. It is a Sunrace 13-34 7 speed. (I hope I worded that correctly). From what I have read cassettes are better than freewheels for whatever reason. Stronger? More dependable? I don't know.
Can I buy a pair of wheels with a hub that will accept a Shimano 7 speed cassette? Do I need a spacer? Can I buy a pair of wheels that will accept a 7 speed freewheel? If so, which would you do? What should I look for in a a set of wheels? Where can I buy them?
Sorry for all of the questions. This is all like a foreign language to me right now, but I want to learn.