You might already know this, but there are tons of bikes all around Uppsala. Basically, that's the main way of transportation here. So, you'll probably want to get your own. There are many places where you could get them, so here are a couple of ideas:
- If you're living in student buildings, check the boards! Tons of students post flyers there to sell their bikes.
- There are small stores selling used bikes. There are some in student areas (like in Flogsta), but they might be over prised, so do your research first!
- Check http://www.blocket.se/ The magic swedish word is "cyklar" (under Fritid & hobby).
- Check out sport stores for new bikes, like http://www.stadium.se/ and http://www.teamsportia.se/