Opinion. All Generalizations are false. ;-)
..For a long time I have been seeking a small electric powered wheel for a number of purposes – inquiries in China revealed such a “single wheel” 10Kg which can be DIRECTLY RIDDEN ... Just what a backpacking traveller needs.
And the specifications? ...Well... Those, Quality and Value – durability -can vary a lot. There's quite a few “badge engineers” on the market, and several designs, some of whose specifications you should not believe, other than “colour” perhaps...
The ones made by “Joyor” use a large direct multi pole hub engine, rather than a small motor with a belt drive, like Air-wheel - here's the Joyor, and its details
This is NOT badge engineering – here's their factory
Other manufacturers I'll also check out.
* Response from Air-Wheel was “not interested” - perhaps just as well.
2508-014 Lord Oxford, Pai, Thailand