Park Tool CC-4.2 Bicycle Chain Wear Checker

Park Tool CC-4.2 Bicycle Chain Wear Checker

Takes the guesswork out of determining when a chain is worn out Accurately measures wear on all 1/2" pitch bicycle chains Compatible with all 5-to-13 speed chains Compatible with single-speed chains Compatible with SRAM AXS 12-speed chain Go/no-go gauge indicates 0.5%, 0.75% and 1.0% wear Made in the USA A worn bicycle chain causes poor shifting performance and and actually wear out drivetrain components, causing more expensive problems. The Park Tool CC-4.2 Chain Checker is a drop-in style gauge that measures bicycle chain wear. The laser cut CC-4.2 accurately measures a long section of chain and strategically comes in contact with 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 AXS and Shimano XTR 12-speed chains) and is designed to accurately indicate when a chain reaches 0.5%, 0.75% and 1.0% wear, the points at which most chain manufacturers suggest replacement. The CC-4.2 provides measurements at the two most common wear intervals recommended for chain replacement on multi-speed bicycles: