bike wrench

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A place to ask bicycle repair questions, and for bike shop monkeys to share advanced non commercial wrenching resources (no YouTube self promotion). This is only for repair related topics.

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My chain checker tool has been lying to me. (rant and PSA) (lemmy.ca)

submitted 9 months ago by [email protected] to c/bikewrench

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

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?

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[–] [email protected] 2 points 9 months ago

Same with the caliper suggestion, when fractions of a millimetre make the difference between a "worn" chain and a good one, I wouldn't want to use a ruler. Especially not on the bike.

It's so easy to use a chain checker tool, I'm not sure why anyone would use rulers and calipers. Just make sure you use an accurate one, which is the point of the post.