thanks for the info

1. I was thinking 32 would be my default, and then potentially get bigger ones for the winter.

2. from what I've heard, and having no experience, I understood disc brakes to have better control, so I was thinkinng that it would help avoid a lock-up situation... at least, that's what I was hoping

3. This I don't know, I just arrived in NE switzerland, and never having done a winter here or anywhere that it actually snows it's hard for me to say, from what I saw at the tail end of the winter/start of spring, the roads are plowed quite quickly here after a snowstorm. The temp thing is also an unknown, and something I won't be able to know until I give it a go I think.

I know some people reguarly ride in the snow, but I wasn't sure if it was 20 miles or 2 miles. I do have a train line so bailing out halfway is quite feasible if I can't feel my toes anymore.