A worn bicycle chain causes poor shifting performance and can actually wear out drivetrain components, causing more expensive problems. The Park Tool CC-4 Chain Checker 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 determining when chain replacement is necessary. The tool works on any 5 to 12-speed derailleur chain (including SRAM® T-Type, SRAM® Flattop™, and Shimano® XTR® 12-speed chains) and is designed to accurately indicate when a chain reaches 0.5% and 0.75% wear, the points at which most chain manufacturers suggest replacement.
ParkTool CC-4 Chain Checker
- 5-to-10-speed chains: replace chain at or just before 0.75%
- 11-to-12-speed chains: replace at or just before 0.5%
- Check with manufacturer for specific replacement instructions
-If you are not 100% satisfied with your purchase, you can return the product and we'll refund the full cost of the item minus shipping costs or exchange the product for another one, be it similar or not.
-You can return a product for up to 30 days from the date you purchased it.
-Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt.