Originally Posted by
herbarium
That's exactly what I need it for, a black Schwinn 564 in roughly the same condition!
I've seen one of those schwinn aluminum frames retrofitted with a seattube collar, but I don't know how well that works. I guess you'd have to trim the top of the tube to get a level surface for the collar. But the original seatposts seem to cost as much as the frames these days if you can even find one.