Park Tool CC-4.2 Chain Checker Tool Compatible with 5 to 13-speed

Compatible with 5 to 13-speed and single-speed chains

Ride like a VIP and see what all the hype is about

It has been thoughtfully updated to respect the heritage of the classic design while incorporating modern elements for new generations

The Park Tool CC-4

Laser-cut design contacts the chain at three points

Park Tool CC-4.2 Chain Checker Tool Compatible with 5 to 13-speedA worn bicycle chain can cause poor shifting and expensive drivetrain damage. The Park Tool CC 4. 2 Chain Checker is a drop in gauge that measures chain wear accurately. It contacts the chain in three places, eliminating guesswork. Compatible with 5 to 13 speed and single speed chains, it indicates wear at 0. 5%, 0. 75%, and 1. 0%, matching manufacturer replacement recommendations. Measures bicycle chain wear accurately, preventing expensive