This is because the wheel IS THE WHEEL and the axel is the part that the wheel turns on!Hope this helps!
it is a wheel and axle...I think with levers to turn the wheel
1 wheel on a unicycle
A Unicycle.
It looks like a Diffney puzzle and would probably mean: One wheel on the unicycle.
It is an electric unicycle manufacturer, a best seller of electric unicycle.
If you sit inside the wheel it's a Monowheel, if you sit on top it's a unicycle.
A unicycle. A wheelbarrow
A unicycle is a cycle with just one wheel. The prefix "uni" means one.
Balancing on the single wheel of a unicycle is difficult to master.
monocycle.
one wheel on a unicycle
unicycle