I don't know if it has ever been done but it might be a good idea to do a survey of those who have had bikes stolen or parts of bike stolen to see what form of locks were used and how the bikes were locked. Although I never lock my bikes here in rural France I have just bought my daughter a very nice bike for use in London. I would hate for it to be stolen.
When I am touring I do use the abus u mini lock mentioned above which I consider to be very good value but HEAVY.
I don't know if it has ever been done but it might be a good idea to do a survey of those who have had bikes stolen or parts of bike stolen to see what form of locks were used and how the bikes were locked. Although I never lock my bikes here in rural France I have just bought my daughter a very nice bike for use in London. I would hate for it to be stolen.
When I am touring I do use the abus u mini lock mentioned above which I consider to be very good value but HEAVY.