[BWA]

Pretty easy to mount using a beam axle with an appropriate bracket at each end.

Would also be easy to mount on uprights with an appropriate sized hole (looks to be about 28MM) bored in it...….

Would be pretty simple to mount on a Classic Mini rear trailing arm....

I see no problems at all, mounting these to a vehicle, with a little thought and simple engineering...….

They are fairly low powered, and, the vehicle would have to be very light, with very modest top end, probably in the 35 KPH range....

 

[BWA]

Here's a pic of the beam axle approach, pretty simple and straight forward really

https://visforvoltage.org/sites/default/files/u454/hub motor jpeg.JPG

 

[BWA]

Just by rotating the brackets 90 degrees, you would pick about 3 inches more clearance.....

You could also machine up a bushing to mount the stub axle right in the end of a tube axle...….

Lots of ways to accomplish stuff....

I'm pretty sure no one would even try mounting the double shaft ones on a car, maybe on a three wheeler, but, I'm pretty sure not a 4 wheeler...…..I wouldn't...