Only use U locks, and make sure they are off the top of GA2G's locks list - Make sure one of them is a Kryptonite NY Fagheddaboudit. It also makes a superb weapon. Chains are crap as are cables. If you have a nice Brooks saddle you're going to need to lock that up too. Lock your wheels up, not just the frame, and keep your bike in view at all times. don't leave it locked outside for days on end.
Theft is ridiculously high. In a nutshell:
Only use U locks, and make sure they are off the top of GA2G's locks list - Make sure one of them is a Kryptonite NY Fagheddaboudit. It also makes a superb weapon. Chains are crap as are cables. If you have a nice Brooks saddle you're going to need to lock that up too. Lock your wheels up, not just the frame, and keep your bike in view at all times. don't leave it locked outside for days on end.