Originally Posted by
swf8322
The bearings are the same but asymmetrical, with an internal conic bevel on one side and an external on the other. The external bevel goes into the cup, the internal bevel fits the conic crown race, or centering cone on top.
On your headset the sequence from the bottom to top is: cone -cup-cup-cone. So the bearings would also mirror, one up, one down.