Here is a handy tracker that lets you track your items anywhere in the world. The iTraq+ is a cellular+GPS tracking device that provides you with precise location information. Just attach the device to your bicycle or anything else you want to track, and the rest is easy. iTraq+ uses cell towers to calculate its location. When you need more accuracy, just turn the GPS mode on.
iTraq+ uses a hybrid approach to help you find your valuable item when they are close or far away. More information is available here.