• I see, thanks for the explanation. May buy a MTB bb as they're much cheaper however this for a 1x build so should I actually be shortening the chainline from a double set up, or does it not really matter?

  • May buy a MTB bb

    You won't find an MTB Octalink BB with the short splines required for the 6500 cranks, they stopped making them 15 years ago. At this point, for a 1× road build, you should be cutting your losses and buying an FC-S501 Alfine HT2 crank and BB

  • Found the problem, spindle seems to have broken as each side is moving independently...
    Think I'll try and find a v1 bb for cheap as this is meant to be a parts bin build! That would make sense in the long run though

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