I don't even want to think of in terms of "[insert speed limit] bike", to me it makes more sense that your bike is however fast you ride it, and if it's an elec

I don't even want to think of in terms of "[insert speed limit] bike", to me it makes more sense that your bike is however fast you ride it, and if it's an electric assist bike, you ride however fast your muscle plus the limited power of the engine ride it. Then it's only a matter of finding the right balance of power that makes the thing useful without turning it into an insane crotch rocket.