Just read that a worn chain can stretch over half an inch in 100 links, found it in an old Park Tool manual

Kevin331 has a point about the skipping, but half an inch of stretch sounds like a worst-case lab test number. Most people replace their chain way before it gets that bad. A chain that worn would probably just snap under any real load, not just skip. Park Tool manuals are solid, but that's a failure point you'd never actually ride on.

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derek_lee6mo ago

Holy cow, that's a crazy amount of stretch... I can't even picture a chain getting that bad. Emma96 is right, you'd have to be trying to destroy it to get there.

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morganmartinez3mo ago

Half inch is still wild but actual snapped chains happen way more often than people think.

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kevin3316mo ago

Half an inch on a hundred links is just wild to picture. That's like every single pin and roller being totally shot. I bet that thing would skip over a brand new cassette like crazy. You would have felt that just pedaling around the block.

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