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Continue to Chatsquare taper and octalink bb axles https://cycletechreview.com/2012/road/bicycle-bottom-bracket-evolution-2/attachment/more-bb-axles-005/
square taper and octalink bb axles https://cycletechreview.com/2012/road/bicycle-bottom-bracket-evolution-2/attachment/more-bb-axles-005/