PARK TOOL
CC-4 CHAIN CHECKER
• Drop-in style gauge that measures bicycle chain wear.
• Quickly and easily taking the guesswork out of knowing when chain replacement is necessary.
• Works on any 5 to 12-speed derailleur chain (including SRAM® AXS®)
• Laser cut, accurately indicates when a chain reaches .5% and .75% wear, the points at which most chain manufacturers suggest replacement.