Check chain slack every two weeks, not just at service time
Catches a stretching chain months before it damages the sprockets. Fewer than five independent reports so far, so it is still unverified — try it and file one.
Why it works
A chain stretches gradually as it wears, and a stretched chain accelerates sprocket wear, which is the expensive part to replace. Checking slack by hand every couple of weeks catches the stretch early enough to just adjust it, rather than discovering it as a costly sprocket replacement at service.
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