I would get a frame lock (o-lock) for the rear tire. You should see people look at those things. Most people in north america have never seen one and would not know how to remove it. I also would get 2 u-locks and some good square chain and another new york fahgettaboudit lock. If you simply make the theft take too long the thief will pick another bike. I myself use a combo just like this on my European bicycle and it works great. It takes 2-3 minute to lock up though.