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@Rik_Van_Looy
^^ both ISO & JIS BB axles have 2deg taper.
ISO BB's taper down a bit more so that the square bit on the end is smaller than a JIS - that's why the learned gentlemen above suggest a JIS bb should be 2mm shorter in axle length than the intended ISO BB
(IIRC 75's take 109, so a JIS equivalent would be 107mm)
ignore anyone who says the difference is 4.5mm they are followers of sheldon brown. I, like mr lee above am a disciple of the tester