Park Tool Chain Checker CC-3.2

The Park Tool Chain Checker CC-3.2 is a go/no-go gauge designed to accurately measure chain wear, helping you avoid the guesswork. It indicates when a chain reaches 0.5% stretch for 11 and 12-speed chains, and 0.75% stretch for 9 and 10-speed chains. Regularly checking your chain wear with the CC-3.2 helps prevent poor shifting and premature drivetrain wear, ultimately saving you money and maintaining your bike’s smooth performance.