Park Tool Chain Checker CC-3.2

The Park Tool CC-3.2 Chain Checker is a precise go/no-go gauge designed to accurately measure chain wear and take the guesswork out of drivetrain maintenance.

The CC-3.2 indicates when a chain reaches 0.5% and 0.75% wear, the two replacement thresholds recommended by most chain manufacturers. Catching chain wear at the right time helps extend the life of cassettes and chainrings while maintaining crisp, reliable shifting.

The tool is long, rigid, and highly accurate, with permanent measurement markings that won’t wear off over time. It works across a wide range of drivetrains, making it a staple for both professional shops and home mechanics.

How to Use

• 9- & 10-speed chains: Replace the chain when the 0.75% side fits flat into the chain

• 11- & 12-speed chains: Replace the chain when the 0.5% side fits flat into the chain

Key Features

• Go/no-go chain wear measurement

• Indicates 0.5% and 0.75% chain wear

• Helps prevent premature cassette and chainring wear

• Permanent, easy-to-read markings

• Durable, accurate construction

Compatibility

• Works on most derailleur chains from 5- to 12-speed

Specifications

• Tool Type: Chain Checker

• Model: CC-3.2

An essential diagnostic tool for keeping modern drivetrains running smoothly and economically.