If the bottle holder does not fit into the designated holes on the bicycle frame, the Cage Shifter comes into play. With its convenient elongated holes, it allows for the adjustment of the bottle holder holes by 1.5 to 4.5 cm. Thanks to its flat design, it integrates discreetly into the frame. Once mounted, the bottle holder can be easily attached to the Cage Shifter with the two included screws. Made from lightweight polycarbonate.