• the problem is, i think you're the only person who cares.

    Isn't that to do mostly with this "standard" being in place before narrow wide rings were a thing anyway?

  • Trading standards would care if anybody brought it to their attention.

    N/W is irrelevant, the chain guard requirement is about keeping people out of the chain/ring interface, not keeping the chain on. If anything, typical N/W rings with their tall and chamfered teeth are a bigger danger than old fashioned rings with flat-topped teeth.

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