Quickly and accurately determine the wear and elongation of any chain.
Compatible with all bicycle chains
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
Insert the Chain Checker's pins into two links, press the swing arm gauge tight, and check the gauge window for an accurate reading
Made in the USA..
The co-owners were hands-on bicycle repair folk back in the 1950s when bikes were simpler. Starting in the 1960s, bikes started getting more complex and the need for purpose-specific bike tools arose and Howard and Art met that need. Now more than 50 years into its journey, Park Tools is still developing and producing some of the finest bicycle tools in existence.