NutFix is an innovative solution for securing bicycle components. The system protects wheels as well as seat posts from theft. It features a mechanism that only releases the subjacent screw when the bicycle is lying on its side, otherwise no access is possible. In addition to a lock, which ideally fastens and locks the frame and wheels, NutFix offers an exceptional additional protection for the wheels and the saddle. If the bicycle is vertically fastened to an object, the NutFix caps cannot be removed, thus denying access to the nut, therefore ensuring that all components of the bicycle remain safely in place.