I need some clarification here... A retainer is the metal band with the notches that actually holds the ball bearings together. When you say "race", do you mean the ring, or stationary cone, that is pressed on the fork first or are you talking about the "cups"? On most postwar Schwinns, the upper and lower cups are exactly the same and take #2552 bearings. On some bikes, instead of a cup, the upper has an insert that fits in the headtube and takes the smaller size #73 bearings. It has an adjustable cone that is different looking. Clear as mud? :roll: Post some pics of what you have, that will help. Or, I can post pics of a headset if you want. B607