Park Tool CC-3.2 Chain Wear Indicator

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A worn chain shifts poorly and wears sprockets at an accelerated rateThe 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 replacementThe 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 Show more