CC-4

The Park Tool CC-4 Chain Wear Indicator is an indispensable tool for any cyclist looking to maintain their bike in tip-top condition. This little gadget is incredibly easy to use and provides a quick, accurate measure of chain wear, helping you decide whether it's time for a replacement before you suffer a mid-ride breakdown. The build quality is solid, typical of Park Tool's high standards, ensuring that this tool can withstand being tossed around in your tool kit without a problem. It’s a simple, yet effective way to extend the life of your drivetrain components by ensuring you never ride on a worn-out chain. For anyone serious about bicycle maintenance, this tool is a must-have. A small investment to keep your bike running smoothly and efficiently!

It’s simple and inexpensive. It’s Park tool quality and it works. In the end, it will probably save you a lot of money replacing your drivetrain if you check your saying wire somewhat regularly with one of these

For the money, this tool works well. Seems like it will last a long time if treated with care. Pretty easy to learn how to read. Seems to be much better than attempting to measure the chain on the bench with a tape measure or ruler. Quick to use too, since you can use on the bike and measure several spots really quick to get a good idea of how the chain is stretching and replace it before it wears the cassette out.

I recently bought the Park CC4 chain wear indicator as it works on all bike chains including 12 speed chains. Super easy to use. Replacing your chain often is key to drive train maintenance. Much cheaper to replace a chain than cassettes and chain rings.

Works easily

Great tool really easy to used.

Now I can tell when my chain needs replacement. I no longer have to rely on my bike shop to tell me. It takes less than 2 seconds to see whether your chain needs replacement. For 11 and 12 speed chains, replace after .5% wear. For 10 speed chains, replace after .75% wear. Just snap onto the upper or lower chain section and see where the opposite end winds up. The video provided is excellent.

Great

This chain wear indicator is more accurate than the two point design as it eliminates roller wear from the measurement showing actual stretch (pin wear). This is the measurement that is important.

Gute Qualität!

Pros: ✔️ Very easy to use ✔️ Longer measuring span reduces error ✔️ Solid and precise build ✔️ Quick chain check in seconds Cons: ✖️ No real drawbacks for this type of tool Review: It simply does what it’s supposed to do. The tool is straightforward and very easy to use — you can check chain wear within seconds. A big advantage is its length. Because it measures over a longer section of the chain, it minimizes measurement error compared to shorter gauges. This gives more confidence in the result, especially when maintaining drivetrain components regularly. Overall, a simple but essential tool that works exactly as expected.

Easy way to see chain wear if the end point slips into the chain linkage. Keep your chain clean and lubricated and it will last much longer. An overly oily chain attracts dust and forms a paste that wears out your chain faster and will cost you money to replace.

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