CC-4.2 Chain Checker

Regular price $19.95
Regular price Sale price $19.95
Shipping calculated at checkout.
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Most items ship within 24–48 hours. Bikes require professional assembly and tuning before shipping, so please allow 2–7 business days for preparation prior to shipment.
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Brand: Park Tool
SKU: CC-4.2
Regular price $19.95
Regular price Sale price $19.95

Product information


A 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 drivetrain damage
  • Laser-cut design contacts the chain at three points, providing quick and precise wear measurement
  • Compatible with 5 to 13-speed derailleur chains and single-speed chains
  • Indicates chain wear at 0.5%, 0.75%, and 1.0%, aligning with manufacturer recommendations for replacement