cycleops612
10 kW
Marry the gyroscopic magic of hoverboards with the seemingly forgotten (except by clowns, who also seem a bit forgotten) unicycle.
It ticks many boxes.
Decent size wheel, seat, compact w/o folding, light but strong, simple, cheap...
For muscle:
https://www.google.com.au/imgres?imgurl=http%3A%2F%2Fassets.inhabitat.com%2Fwp-content%2Fblogs.dir%2F1%2Ffiles%2F2011%2F11%2FRyno-Electric-Unicycle-1.jpg&imgrefurl=http%3A%2F%2Finhabitat.com%2Fthe-ryno-electric-unicycle-is-a-one-wheeled-muscle-machine%2F&docid=htndifFlVO3_2M&tbnid=IqdmvW1L_QDVUM%3A&w=728&h=532&bih=312&biw=702&ved=0ahUKEwin9oPD0dLPAhVGVj4KHSBfBukQMwgnKAcwBw&iact=mrc&uact=8
OR:
https://www.google.com.au/imgres?imgurl=http%3A%2F%2Fwww.electric-bicycle-guide.com%2Fimages%2FBTbike_unicycle.jpg&imgrefurl=http%3A%2F%2Fwww.electric-bicycle-guide.com%2Felectric-unicycle.html&docid=2yAgTFBjeFzSUM&tbnid=o3rUQs4RpqoegM%3A&w=280&h=426&bih=312&biw=702&ved=0ahUKEwin9oPD0dLPAhVGVj4KHSBfBukQMwhgKDcwNw&iact=mrc&uact=8
https://www.google.com.au/imgres?imgurl=http%3A%2F%2Fpsipunk.com%2Fwp-content%2Fuploads%2F2011%2F07%2Ffuture-Electric-vehicle-Unicycle-Vasco-Oliveira-04.jpg&imgrefurl=http%3A%2F%2Fpsipunk.com%2Felectric-unicycle-by-vasco-oliveira%2F&docid=T-crqmVIPJY8kM&tbnid=Ja7bDALztvJLoM%3A&w=500&h=373&bih=312&biw=702&ved=0ahUKEwin9oPD0dLPAhVGVj4KHSBfBukQMwhwKEcwRw&iact=mrc&uact=8
https://www.google.com.au/imgres?imgurl=http%3A%2F%2Fwww.pinwheelonline.com%2Fd%2Ffile%2FNews%2FReading%2F2016-04-11%2F1b74a15bbf27107ddba34852779ab49b.jpg&imgrefurl=http%3A%2F%2Fwww.pinwheelonline.com%2FNews%2FReading%2FBest-Electric-Unicycles-2016-Guide.html&docid=YD7tLJ-NqD27oM&tbnid=vym54Grag43unM%3A&w=640&h=443&bih=312&biw=702&ved=0ahUKEwin9oPD0dLPAhVGVj4KHSBfBukQMwguKA4wDg&iact=mrc&uact=8
fyi, mono skate board
https://www.google.com.au/imgres?imgurl=http%3A%2F%2Fimage.made-in-china.com%2F43f34j00eOGtgBPRCKcS%2FNew-Design-Flash-LED-Light-Electric-Skateboard-One-Wheel-Self-Balancing-Electric-Unicycle-Scooter.jpg&imgrefurl=http%3A%2F%2Fykzyao.en.made-in-china.com%2Fproduct%2FdXYErTVMLZkF%2FChina-New-Design-Flash-LED-Light-Electric-Skateboard-One-Wheel-Self-Balancing-Electric-Unicycle-Scooter.html&docid=YB5Xp1KF93KTTM&tbnid=8R3jt675R3n6KM%3A&w=300&h=300&bih=800&biw=1421&ved=0ahUKEwjh4dOG0tLPAhXMOj4KHYvtCZE4rAIQMwhDKEEwQQ&iact=mrc&uact=8
It ticks many boxes.
Decent size wheel, seat, compact w/o folding, light but strong, simple, cheap...
For muscle:
https://www.google.com.au/imgres?imgurl=http%3A%2F%2Fassets.inhabitat.com%2Fwp-content%2Fblogs.dir%2F1%2Ffiles%2F2011%2F11%2FRyno-Electric-Unicycle-1.jpg&imgrefurl=http%3A%2F%2Finhabitat.com%2Fthe-ryno-electric-unicycle-is-a-one-wheeled-muscle-machine%2F&docid=htndifFlVO3_2M&tbnid=IqdmvW1L_QDVUM%3A&w=728&h=532&bih=312&biw=702&ved=0ahUKEwin9oPD0dLPAhVGVj4KHSBfBukQMwgnKAcwBw&iact=mrc&uact=8
OR:
https://www.google.com.au/imgres?imgurl=http%3A%2F%2Fwww.electric-bicycle-guide.com%2Fimages%2FBTbike_unicycle.jpg&imgrefurl=http%3A%2F%2Fwww.electric-bicycle-guide.com%2Felectric-unicycle.html&docid=2yAgTFBjeFzSUM&tbnid=o3rUQs4RpqoegM%3A&w=280&h=426&bih=312&biw=702&ved=0ahUKEwin9oPD0dLPAhVGVj4KHSBfBukQMwhgKDcwNw&iact=mrc&uact=8
https://www.google.com.au/imgres?imgurl=http%3A%2F%2Fpsipunk.com%2Fwp-content%2Fuploads%2F2011%2F07%2Ffuture-Electric-vehicle-Unicycle-Vasco-Oliveira-04.jpg&imgrefurl=http%3A%2F%2Fpsipunk.com%2Felectric-unicycle-by-vasco-oliveira%2F&docid=T-crqmVIPJY8kM&tbnid=Ja7bDALztvJLoM%3A&w=500&h=373&bih=312&biw=702&ved=0ahUKEwin9oPD0dLPAhVGVj4KHSBfBukQMwhwKEcwRw&iact=mrc&uact=8
https://www.google.com.au/imgres?imgurl=http%3A%2F%2Fwww.pinwheelonline.com%2Fd%2Ffile%2FNews%2FReading%2F2016-04-11%2F1b74a15bbf27107ddba34852779ab49b.jpg&imgrefurl=http%3A%2F%2Fwww.pinwheelonline.com%2FNews%2FReading%2FBest-Electric-Unicycles-2016-Guide.html&docid=YD7tLJ-NqD27oM&tbnid=vym54Grag43unM%3A&w=640&h=443&bih=312&biw=702&ved=0ahUKEwin9oPD0dLPAhVGVj4KHSBfBukQMwguKA4wDg&iact=mrc&uact=8
fyi, mono skate board
https://www.google.com.au/imgres?imgurl=http%3A%2F%2Fimage.made-in-china.com%2F43f34j00eOGtgBPRCKcS%2FNew-Design-Flash-LED-Light-Electric-Skateboard-One-Wheel-Self-Balancing-Electric-Unicycle-Scooter.jpg&imgrefurl=http%3A%2F%2Fykzyao.en.made-in-china.com%2Fproduct%2FdXYErTVMLZkF%2FChina-New-Design-Flash-LED-Light-Electric-Skateboard-One-Wheel-Self-Balancing-Electric-Unicycle-Scooter.html&docid=YB5Xp1KF93KTTM&tbnid=8R3jt675R3n6KM%3A&w=300&h=300&bih=800&biw=1421&ved=0ahUKEwjh4dOG0tLPAhXMOj4KHYvtCZE4rAIQMwhDKEEwQQ&iact=mrc&uact=8