Park Tool CC-3.2 Chain Wear Indicator

The Park Tool CC-3.2 Chain Wear Indicator is a precision gauge that tells you exactly when your chain needs replacement. Using go/no-go measurement points at 0.5% and 0.75% wear, it prevents the domino effect of a worn chain damaging your derailleur and cogs. Compatible with 5-to-12-speed derailleur chains, this tool features durable construction with permanent markings for reliable, repeatable measurements. A small investment that saves costly component replacements down the road.