I watched a video from Zero Friction Cycling where he tested a bunch of chain checker tools.

<Screenshot shows the results from the video> The original video can be found here.

Only a few were accurate, and the Park Tool CC-3.2 check that I’ve been using for a few years now, seems to be one of the bad ones.

Today, I decided to get the CC-4 (the Shimano checker they recommended isn’t available in Canada, apparently), and rechecked the chains on my bike.

It went from “beyond 0.5mm wear” with the CC-3.2 to “not even close to 0.5mm” on the CC-4.

I guess I figured out why my chains weren’t lasting long… according to the CC-3.2. 🤑😭

What chain checker tool(s) are you guys using, and have you used any that were just flat out wrong?