CC-4.2 Chain Checker Tool

A worn bicycle chain can lead to bad shifting and costly drivetrain damage. The Park Tool CC - 4.2 Chain Checker is an easy - to - use gauge that precisely measures chain wear. It touches the chain at three spots, getting rid of any guesswork. This tool works with 5 to 13 - speed derailleur chains and single - speed chains. It clearly shows wear at 0.5%, 0.75%, and 1.0%, following the manufacturer's replacement advice. Key features include accurate chain wear measurement to prevent expensive drivetrain problems, a laser - cut design for quick and exact wear readings, wide compatibility with various chain types, and clear wear indication according to industry standards.

Using the Park Tool CC - 4.2 Chain Checker is easy. First, make sure your bike chain is clean. Then, simply drop the checker onto the chain. It will contact the chain at three points. Check the markings on the checker to see if the chain wear is at 0.5%, 0.75%, or 1.0%. If it reaches the recommended replacement level, it's time to change the chain. As for maintenance, keep the checker clean after each use. You can use a soft cloth to wipe it. Store it in a dry place to prevent rust. Also, don't drop or hit the checker hard as it may affect its accuracy.