Specialized trispoke, 650c front Wolber/Campag, NJS pedals, Concor, Shimano 600 bits and bobs

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Ced

Has the free hub got internal threads or just external threads?

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haveo in reply to @Ced

Do you mean for a cassette lock ring? If yes, it has internal threads, as well as external threads. The current cassette is secured with a lock ring over the last cog.

There are close up picture in the Flickr link if that'll help.

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