Park Tool Chain Checker | Chain Wear Indicator CC-4

The 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 designed to accurately indicate when a chain reaches .5% and .75% wear, the points at which most chain manufacturers suggest replacement.

Instructions:

A worn chain shifts poorly and wears sprockets at an accelerated rate. The CC-4 is a “go-no-go” gauge designed to accurately indicate when a chain reaches 0.5% and 0.75% wear, the points at which most manufacturers suggest replacement (contact the chain manufacturer for specific replacement recommendations).

1. Lower the CC-4 onto the chain while keeping the gauge tip above the chain (Figure 1).
2. Apply and maintain tension on the chain at the location shown in Figure
3. Note: It is crucial to maintain pressure on the chain in order to obtain an accurate reading.
4. While maintaining tension on the chain, push the chain onto the gauge tip to determine if the chain is worn (Figure 3).

SKU# PT-CC4