Bottom Bracket Lockring

Some articles on lockring, lockrings:

Fixed-gear Bicycle - Conversion
... or track-bike hub includes special threads for a lockring that tightens in the opposite (counter-clockwise) direction compared with the cog ... for the cog and not the reverse threads for the lockrings used on track/fixed hubs ... The sprocket on a hub without a lockring may unscrew while back pedalling ...

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