Manufacturers recommend chain replacement before rear cog replacement to alleviate poor shifting and uneven drive train wear. The Park Tool Chain Checker allows you to quickly and accurately determine the wear and stretch of any chain. Just insert the Chain Checker’s pins into two links, press the swing arm gauge tight, and check the gauge window for an accurate reading.|
The CC-2 is 10-speed and 11-speed compatible. For modern 9- and 10-speed chains, replace chain at or just before the 0.75% readings. For 11-speed chains, replace at or just before the 0.5% reading.
Manufacturer's Part Number: CC-2