I notice there’s no overview picture of that cycle, so it’s not real obvious. But I’m pretty sure that nice looking yellow thing is a restored Columbia.
Both Columbia and Schwinn used the popular Ashtabula forks, made in Ashtabula, Ohio. That’s probably why it looks like an old Schwinn fork. Columbia was one of the only unicycles out there that was actually made in America. The Schwinns were initially, but at some point nearly all of it was coming from Asia.
I don’t know about the tire, other than it doesn’t match the one on my Columbia (which probably isn’t original either).
You could ask the guy who posted those pictures too, you know…
John, from now own I’m going to read your posts in a Bullwinkle the Moose voice (And for those of you not familiar with Rocky and Bullwinkle; they had a “Mr. Know It All” segment. Any other Jay Ward fans out there?)