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and the inner surface of the roller rubbing on said protrusion from the outside
Material :Hardened steel / TPR
First to introduce to the market
Very compact and therefore well suited for small frames
Park Tool Chain Checker Bicycles and the inner surface ofThe CC 4 is a drop in style gauge that measures bicycle chain wear. The laser cut CC 4 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 knowing when chain replacement is necessary. A worn chain will cause poor shifting as well as accelerate drivetrain wear. The tool works on any 5 to 12 speed derailleur chain (including SRAM AXS) and is