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. ๐ค๐ญ
What chain checker tool(s) are you guys using, and have you used any that were just flat out wrong?
Uh. On all bikes throughout my entire life, both pedal- and motor-, I've just measured center-to-center on the link pins with a ruler, like it says in the manual. It's even easier on a bicycle than a motorcycle because you can just grab a pedal with one hand and make sure all the slack is taken up out of the chain. You don't even have to get your hands greasy.
For sprocket and/or chainring wear, my rule of thumb has just been once the teeth start looking like the water in Super Mario Bros. world 2-2, it's time for a new one.
That's gotten me across many hundreds of thousands of miles, no sweat. I fail to see how spending money on a specialized (and apparently shitty) tool to make this more complicated on yourself is a better way to live your life vs. spending that money instead on tires/oil/honey waffles/whatever it is you're into.
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.