Park Tool CC-4.2 Chain Wear Indicator

Preserve the lifespan of your bike's drivetrain and maintain optimal riding performance with the Park Tools CC42 Chain Wear Indicator. A must-have for avid cyclists and professional bike technicians alike, this tool helps you detect chain wear before it leads to poor shifting performance and costly damage to drivetrain components.

Our Chain Wear Indicator utilises a simple but effective drop-in style gauge system. More than just a cursory scanner, the laser-cut CC-4.2 takes measurements across a long length of the chain. Its design allows contact with the chain in three places, eliminating any guesswork in determining when a chain needs to be replaced.

This versatile tool is compatible with any 5 to 13-speed derailleur chain, including popular models from SRAM, Shimano, and Campagnolo, as well as single-speed chains. It provides precise measurements when a chain reaches 0.5%, 0.75%, and 1.0% wear - the recommended replacement points by most chain manufacturers.

Though every cycle drivetrain is unique – with some manufacturers having specific component recommendations – our Park Tools CC42 Chain Wear Indicator is a universally trusted instrument to ensure your bike chain performs at its best for longer. Proudly made in the USA, this reliable product is backed by Park Tool's legendary limited lifetime warranty.