evo.com | Park Tool General Shop Tools > The Park Tool CC 3.2C Chain Wear Indicator Tool easily identifies when it's time to replace your chain. With no room for error, this go/no go gauge is long, accurate, and has permanent indicators for simple use. Check with Manufacturer for Specific Replacement Instructions 5-To-10 Speed Chains Replace chain at or just before 0.75% Go / No-Go Gauge 11-To-12 Speed Chains Replace at or just before 0.5% The CC-3.2 Works on Most Derailleur Chains from 5 to 12-Speed | Park Tool CC 3.2C Chain Wear Indicator Tool 2025 - CC- 3.2 C