Yes, this particular system is probably far from efficient enough for regular bikes, this is more for larger transportation bikes and similar (like this example

Yes, this particular system is probably far from efficient enough for regular bikes, this is more for larger transportation bikes and similar (like this example [0]). Having a chain on those limits their construction options, and they're already electric anyway. I was referring to different types of gears and power transfer like driveshafts or hydraulics [1], if you can make it perform at a consistent 90% efficiency it might beat chain drive in practice even though it shouldn't in theory. [0] https://youtu.be/N02KMeOkevI?t=81 https://youtu.be/N02KMeOkevI?t=81 [1] https://www.youtube.com/watch?v=NTB7XOQA-XQ https://www.youtube.com/watch?v=NTB7XOQA-XQ