How many wheels did the penny farthing have?

there are 1 wheel on an unicycle just remember they use one in a circus and its tall.

There is 1 wheel on an unicycle. Uni means 1.
A unicycle has one wheel.
One. That's why it's called a unicicle: It has one (uni) wheel (cycle).
A unicycle is a one wheeled vehicle that is human powered. It uses a standard bicycle tire but other tires can be used depending on the terrain.
1 unless they are stacked upright to make a giraffe unicycle.
one if youv ever been to the curcus youll understand