Originally Posted by
sillygolem
This is a 7/8" (tube size) BMX. Be aware that a 1" tube uses a 7/8" (22.2mm) actual quill size, which parts sites like to quote even though the size is always quoted based on the steerer tube.
Harris has a few in stock, although it may not have the rise you want:
http://sheldonbrown.com/harris/opc.html#stem
Older Schwinns had a thicker steerer tube, hence the 21.1mm quill. So while it's still a 1" tube, I am 100% sure on the quill stem diameter.
I saw Harris' 21.15 stems while on my hunt, and they're quite disgusting
