I would say that this is very induvidual. My Qu-Ax is, no doubt, a she. Can’t argue for it better than you guys, though, because most arguments I could think of are already used.
Gilby’s most excellent observation notwithstanding, there is a lot of ambiguity on sexing a unicycle. Most of these observations have been from a male perspective.
A female may argue that the unicycle is just so simple, it has to be male.
On the other hand, a male may argue it’s female because only with time and perseverance will you finally figure one out and even then you’ll get thrown at the most unexpected moment.
They may be male because all your unicycles don’t mind hanging out with each other without getting jealous.
They may be female because, you know, there are just so many good looking unicycles out there.
Distance/touring unicycles may be female because they are often highly accessorized.
mine is a babe. the paint job is gold metal flake, and hot pink strippers on the sides. Im a little rough on her though. And I have rolled off of her many times.