the upper profile of the saddle has a slight central gap

especially useful on extended endurance rides

and durability

4 contains everything needed to quickly and easily clean the chain

one-finger braking from the hoods and drops

PARK TOOL CC-4.2 Chain Checker CLEAR OUT the upper profile of theA worn bicycle chain causes poor shifting performance and can 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