Park Tool CC-2 Chain Checker Wear Tool

To alleviate poor shifting and uneven drive train wear, manufacturers recommend chain replacement before rear cog replacement. Now you can quickly and accurately determine the wear and stretch of any chain with the Park Tool Chain Checker. Simply insert the Chain Checker’s pins into two links, press the swing arm gauge tight, and then check the gauge window for an accurate reading.

- 10- and 11-speed compatible
- For the modern 9- and 10-speed chains, replace chain at or just before the 0.75% readings
- For the 11-speed chain, replace at or just before the 0.5% reading

About Park Tools
Park’s pledge for the future is simple: Build the best tools. Their commitment to that principle is stronger than ever. They build bicycle tools and maintenance equipment, it's all they do and they’re good at it. Supplying quality bike tools since 1963.