• I figure if anyone knows the answer to this they'll be in this thread.

    I want to put the old cotter pin cranks back on my grandads Flying Scot that I've just done some restoration work on.

    I have the cranks, Stronglights with the wee 50.4mm bcd, but I don't have any of the original bottom bracket bits and don't really know where to start with looking for one.

    I want (as close as possible to) a 42mm chainline as I'm using a track hub at the rear. Anyone know what length of spindle I need for that? Also, I know there are a few sizes of cotter pins, does everything (crank, spindle and pin) have to match or only certain bits?

    Cheers, Ande.

  • I don't understand the 42mm chainline measurement though, Where are you measuring for this?

    Is that not the standard chainline for track hubs? Admittedly I haven't measured my actual chain;line but googled "track chainline" and that seemed to be what was mentioned in a few places.

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