The Copenhagen Wheel.

Turns your bicycle into a hybrid moped.

https://www.superpedestrian.com/

I've seen this, and it intrigues me. An elegant drop in solution to be sure - but I worry about the increased rotating mass and the solid rear wheel combining to make a bike un-rideable when not using the electric assist.

I remember seeing this on Weeds. I didn't think it was actually real. That's kind of cool.

I'm looking at adding an electric drive to the cargo bike I'm building. I'm just starting out so I'm not an expert, but here are some things that stand out for me on the Copenhagen wheel:

Bike needs rim brakes. (no disc, roller, coaster brakes)
Doesn't support internal geared hubs
Wheel might be difficult to true
about $1000 (seems about right)

I'll be looking elsewhere. I'll probably go with a bottom-bracket mid-drive assist, maybe something like this Bafang unit.

at $1000, its steep, but definitely the most elegant solution to power assist on a bike I have ever seen. Way cool.

Researched it more. First post I see on my e-bike resource dates back to 2009, with people paying for wheels as far back as 2013. Company promising delivery "any day now" years ago. No reports of delivered product.

Someone should make an app that makes the motor work against you so you can simulate climbing on a flat road for those that live where it is flat but need to train for the hills. Essentially an expensive variable resistance trainer function without having to ride a stationary bike or use a non mobile trainer.

T.J. wrote: Someone should make an app that makes the motor work against you so you can simulate climbing on a flat road for those that live where it is flat but need to train for the hills. Essentially an expensive variable resistance trainer function without having to ride a stationary bike or use a non mobile trainer.

Similar devices are already available. Maintenance of the weights is a significant expense.

I was going to say go ride a cheap steel frame bike for training then move to a felt or something like that for racing. By the time you get on the Felt, you will feel like you are flying along compared to the steel frame bike.

Also make sure you have an uber high rolling resistance tire. No need for a fancy attachment.

no need for steel frame bikes or trailers or whatever. Just let all the air out of your tires and ride around.

It's rare that an area is both flat and windless. Point your nose into the wind, wear a flappy plastic rainjacket, and overgear like a madman.

Of course, reading up on the OP'S link, the Copenhuben hag offers regenerative braking. It also recharges when you backpedal. I can track stand pretty well, but it would add a whole new level of skill and fitness challenge to try to recharge your hub while stationary at a traffic light...