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Pro tip: a Park Tool chain checker saved me from an expensive mistake
Three years ago I was working at a shop in Portland and kept sending customers out with stretched chains that were eating their cassettes. Last month I finally broke down and bought the CC-4 after my coworker showed me how a 0.75 reading on his tool matched a worn drivetrain perfectly. Has anyone else had a cheap chain checker give false readings compared to the Park one?
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martin.paige26d ago
Cheap digital calipers can be off by .2mm easy.
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knight.mason26d ago
Grab a cheap set and you're basically playing roulette with your measurements. I've had a $15 caliper read .1mm off on a steel block, then switch batteries and it's magically perfect for a week. @martin.paige is right, you roll the dice every time you squeeze those jaws together. My cheap caliper thinks it's a comedian, telling jokes with 0.2mm margins. I've learned to measure three times and take the middle reading, hoping the average is close to reality.
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the_cole26d ago
Did you try zeroing them on a known standard first?
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