PARK TOOL CC-4.2 Chain Checker baselayer New old stock

New old stock

The wide profile increases air volume

create space to mount additional bottles and/or bags to the same bottle mount

Take your adventures to a new level with the F/All-Road

designed for 700c and 27" wheels

PARK TOOL CC-4.2 Chain Checker baselayer New old stockA 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