Park cc32 chain wear indicator tool a worn chain shifts poorly and wears sprockets at an accelerated rate the cc 32 is a go no go gauge designed to accurately indicate when a chain reaches 5 and 75 the points at which most chain manufacturers suggest replacement the updated cc 32 is longer more accurate and features permanent measurement markings the cc 32 is a go no go gauge designed to accurately indicate when a chain reaches 05 and 075 wear the point at which most cha