Park Tool CC-4 Chain Wear Checker Look snow and rain

snow and rain

The perfect blend of performance and comfort in a flattering fit

Removable bombshell ear pads for form-fitting comfort

fully synthetic lubricant penetrates quickly and deeply into the chain

We never take clear vision for granted

Park Tool CC-4 Chain Wear Checker Look snow and rainA worn bicycle chain causes poor shifting performance and can actually wear out drivetrain components, causing more expensive problems. The Park Tool CC 4 Chain Checker 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 determining when chain replacement is necessary.