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Doesn't a chain naturally stretch over its normal lifespan (before it's worn out)?
They don't stretch, at all if you're talking about the plate stretching over time.
You're talking about chain wear mainly cause by the pin getting smaller as illustrated, which give the impression the chain stretch;
TBH, it's not something people should concern with as long they check the chain wear/bring it to a reputable LBS regularly.
Doesn't a chain naturally stretch during its normal lifespan (before it's actually worn out)? That's what I was aiming at.
I'm not saying it couldn't be done, just wondering if it's worth the trouble. Obviously bolting on track fork ends is a whole nother type of trouble.