The frame number of your bike is unique and makes is traceable. Therefore always note this and keep it in a safe place. With this number you can report the police when your bike gets stolen or missing. You'll find the frame number at the bottom of the frame, near the bracket of the crack axle. Because of possible theft, we advise you to insure your bike properly. We have our own insurance partner ENRA. For more information and registration (in Dutch only), just go to our special webpage over here.