so measure the height of the bottom cup, plus the height of the top cup including any spacers and the locknut, and this is the max stack height of the headset you should order. smaller stack heights can be compensated for by adding more spacers. larger stack heights can't as the locknut won't engage the thread.
so measure the height of the bottom cup, plus the height of the top cup including any spacers and the locknut, and this is the max stack height of the headset you should order. smaller stack heights can be compensated for by adding more spacers. larger stack heights can't as the locknut won't engage the thread.