CC-4 Chain Wear Indicator (SRAM AXS)

A worn bicycle chain causes poor shifting performance and can wear drivetrain components, causing more costly problems. The Park Tool CC-4 Chain Checker is a chain wear gauge. The laser-cut CC-4 accurately measures a long section of the chain and strategically contacts the chain in three places, quickly and easily taking the guesswork out of determining when chain replacement is necessary. The tool works on any 5- to 13-speed derailleur chain (including SRAM® T-Type, SRAM® Flattop™, Shimano® XTR® 12-speed, and Campagnolo® Ekar™ 13-speed chains) and is designed to accurately indicate when a chain reaches 0.5% and 0.75% wear, the points at which most chain manufacturers suggest replacement.

General replacement guidelines:

• 5- to 10-speed chains: replace chain at or just before 0.75%
• 11, 12, and 13-speed chains: replace at or just before 0.5% Many drivetrain manufacturers have specific recommendations for their components

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