Adjustable rods for use in a filing system are disclosed. An example adjustment member to be coupled to a rod for use in a filing system includes a hook extending laterally from an end of the adjustment member and a mounting portion including a means for mounting the adjustment member to the rod. The example adjustment member also includes a resilient structure coupled to the hook and the mounting portion. In this example, the resilient structure permits the hook to dynamically move longitudinally and adjust an effective length of the adjustment member by adjusting the length of the resilient structure in response to a lateral displacement imposed on the rod.