Originally Posted by
bulgie
I mentioned my way of shimming the head tube down to take normal cups, but there's another option, a 1-1/8" ("OS") headset where the cups have been machined down to fit the Schwinn/BMX size head. Then you can use a fork with a 9/8" steerer, if that's a plus for you. I opted to stick with 1" steerer, so I didn't buy the modded headset. I forget who makes it, but they start with a standard headset (steel cups) and either lathe-turn or grind down the spigot that goes into the head bore. Anyone here know who makes those (or made, if no longer available)?
This is what I used:
Headset Reducer
This thing is used for reducing a steer tube that takes 1 1/8 headset to 1 inch. The Schwinn headset tube is smaller than 1 1/8. I bought the reducers and took them to a machine shop and had the OD turned down to 32.6mm from 34mm. At the time I could not find a ready to go reducer to install 1 inch into BMX. Maybe someone makes one now? I popped in the modded reducers and then pressed in cups from a standard 1 inch headset.