• Hi,

    Can someone advise me on NJS Dura Ace 7400 bb. I found out that NJS is a standard for track frames and which means that bb is BSA shell 68 and ISO square taper (not JIS which is a major square taper standard for Dura Ace 7400 bb). On ebay I found two types of NJS bb:

    1) 68-112 which has NJS on both cups and NO NJS writing on the spindle
    2) 68-109 which has NJS on both cups and also NJS writing on the spindle

    Could someone knowledgeable advise me on this subject? Why the bb 68-112 has no NJS on the spindle? Why 68-109 has NJS on the spindle? Does it mean something for the user?

    thanks a lot!

    Tom

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