Park Tool

chain checker


A worn chain shifts poorly and wears sprockets at an accelerated rate

The CC-3.2 is a Go / No-Go gauge designed to accurately indicate when a chain reaches 0.5% and 0.75% wear - the point at which most chain manufacturers suggest replacement

The chain should be replaced soon if the 0.75% side fits into the chain, before other drive train components also start to wear out fast

Longer design measures a greater length of chain, giving greater accuracy

Made from precision, laser cut steel

Consider that if you replace a chain because of wear other vital drive-chain components may need to be renewed too

10-speed compatible

Made in the USA and covered by Park Tool's legendary limited lifetime warranty

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