• Aren't those counter bores to relieve stress on the bend of the spoke?

    No, they are not bell-mouth holes as you would make them to support the spoke bend, they are actual counterbores sized and shaped to accommodate the spoke head. Some pictures on the internet seem to show the large flange C-Record road hubs with counterbores on all the holes, but mine are definitely on alternate holes which, given the 1/2 spoke offset from one side to another, makes them 'handed'

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