• Thank you.

    Just checked on my laptop, the DA BB is 7700 Road and not 7710 Track.

    Have you used both BB with the Shimano Dura Ace 7710 Track Crankset?

    I just want to cross check the compatibility as I understand there are various Octalink versions which are not intercompatible and affect the chainline.

    Thanks again & sorry to be a pain!

  • DA BB 7710 is the track NJS version with sealed bearings and steel cups, the 7700 road has got needle and ball bearings, alloy cups I believe and its not sealed, but both have got 109.5mm axle length.
    These are Octalink V1 with the shallow spline grooves.

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