At this point the Gear Ratio Chart is only interactive in Internet Explorer(be sure to allow add-on or any other permissions it asks for when accessing this page). Functionality will come to all browsers in a few months. If through some miracle you do not have access to Internet Explorer you can download it here as an excel file. If you break it, i.e. delete something and not remebering what it was. Just clear your browser cache, cookies, and history. Then refresh the page and it will have all of the default values.