Park Tool CC-4 Chain Checker

Park Tool

--A worn bicycle chain causes poor shifting performance and \naccelerated wear on drivetrain components, causing more expensive \nproblems\n--The Park Tool CC-4.2 Chain Checker is a drop-in style gauge that measures bicycle chain wear\n--The\n laser-cut CC-4.2 accurately measures a long section of chain and \nstrategically comes in contact with the chain in three places, quickly \nand easily taking the guesswork out of determining when chain \nreplacement is necessary\n--The tool works on any 5 to 13-speed \nderailleur chain (including SRAM\u00AE T-Type, SRAM\u00AE Flattop\u2122, Shimano\u00AE XTR\u00AE \n12-speed, and Campagnolo\u00AE Ekar\u2122 13-speed chains) or single-speed chain, \nand is designed to accurately indicate when a chain reaches 0.5%, 0.75%,\n and 1.0% wear, the points at which most chain manufacturers suggest \nreplacement\n--Some drivetrain manufacturers have unique recommendations specific to their components, always double-check to be sure\n--