Park Tool Chain Checker Bicycle Chain Wear Indicator Gauges

A worn chain is inefficient, "adds resistance to pedaling", shifts poorly and can actually wear out drivetrain components, causing more expensive problems.

CC-2 or CC-3.2 or CC-4.2

Mountain and Road Bikes

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Specs and Features:

  • A worn chain "adds resistance to pedaling" and shifts poorly.
  • The CC-2 or CC-3.4 or CC-4.2 measures how worn the chain is so you'll know when it needs to be replaced.
  • Works on all bicycle derailleur chains.
  • If you continue to ride a worn chain, you run the risk of ruining your cassette and chain rings which are expensive to replace
  • Made from precision laser cut steel with permanent measurement markings.
  • For 9 and 10-speed chains, replace chain just as the gauge fits the 0.75% side, fits flat into the chain.
  • For 11 and 12-speed chain, replace as the 0.5% side fits. 
  • For single-speed chains, replace chain at or just before the 1% reading.


CC-2

The CC-2 is compatible with all derailleur chains. Simply insert the Chain Checker’s pins into two links, lightly press the swing arm gauge, and then check the gauge window for an accurate reading. For 9 and 10-speed chains, replace chain at or just before the 0.75% readings. For 11 and 12-speed chain, replace at or just before the 0.5% reading. For single-speed chains, replace chain at or just before the 1% reading. Check with manufacturer for specific replacement instructions.

CC-3.2

A worn chain shifts poorly and wears sprockets at an accelerated rate. The CC-3.2 is a go/no-go gauge designed to accurately indicate when a chain reaches .5% and .75%, the points at which most chain manufacturers suggest replacement. For 9 and 10-speed chains, replace chain just as the gauge fits the 0.75% side fits flat into the chain. For 11 and 12-speed chain, replace as the 0.5% side fits. The CC-3.2 is long, accurate and features permanent measurement markings.


CC-4.2

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 necessary. The tool works on any 5 to 13-speed derailleur chain (including SRAM® T-Type, SRAM® Flattop™, Shimano® XTR® 12-speed, and Campagnolo® Ekar™ 13-speed chains) or single-speed chain, and is designed to accurately indicate when a chain reaches 0.5%, 0.75%, and 1.0% wear, the points at which most chain manufacturers suggest replacement.