Park Tool CC-3.2 Chain Wear Indicator

A worn chain shifts poorly and wears sprockets at an accelerated rate. The CC-3.2 is a gauge designed to accurately indicate when a chain reaches .5% and .75%, the points at which most chain manufacturers suggest replacement. The updated CC-3.2 is longer, more accurate and features permanent measurement markings.

How to use:

• 5-to-10-speed chains: replace chain at or just before 0.75%
• 11-to-12-speed chains*: replace at or just before 0.5%
• * Check with manufacturer for specific replacement instructions