Any of my Bosch powered eBikes delivered with our dongle can do this.
Sorry you've misunderstood me. Do you not agree that some bikes with standard gearing and a dongle will not meet the requirement of a 30 mph bike? I have no doubt that by increasing the gearing it will make a 30 mph bike. However having said all that the OP isn't looking for that type of bike anyway.Given that I have all sprocket sizes in stock to achieve this. I play with this sort of thing on a daily basis.