Park Tool CC-3.2 Chain Wear Indicator

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