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  • Having a bit of trouble with my new BB, Shimano Dura Ace BB 7700 fitting it into my nagasawa. It the bb won't thread onto anything. Its as if the bb is too big for the shell? Sorry if I am being stupid, I haven't ever used one of these BB's before :/

  • it says 36x24 meaning italian thread which is for 70mm shell. 1.37x24 is english threading and for 68mm shell.

    so you need to get a different bb. or maybe only cups will suffice.

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