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  1. Bermy

    When to replace sprocket?

    That's why I like the old dental picks I have, I have one that will get right in round the nose sprocket, gets out a surprising amount of gunk.
  2. Bermy

    When to replace sprocket?

    Spur sprockets when they have an appreciable groove worn in them...like 1mm...putting new chains on a worn sprocket just wears the chain quicker, trying to force a new chain to run in the old one's groove... Rim sprockets 'float' a bit on the spline,allowing a new chain to find its 'fit' so...
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