Park Tool CC-3.2 Chain Wear Indicator

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Don't let your worn-out chain ruin the rest of your drivetrain. This handy tool is quick and easy to use, and can save you some serious headaches. This "go-no go" chain gauge is designed to let you know when your chain reaches .5% and .75% wear, which is when most chain manufacturers recommend replacement.
  • Updated design is longer for more accuracy
  • Permanent measurement markings won't rub off with wear