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

Park Tool has been manufacturing bicycle specific tools since 1963. A long-term dedication to quality, innovation, and customer service has made Park Tool the first choice of professional and home bicycle mechanics around the world.

Features:

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