If you're after speed, why not just get a motorscooter? A 150cc scooter will get up to 60 MPH. A 50cc moped might get up to 42 MPH. The reason for ebikes are available bicycle paths, exercise, and a boost. Legally, if your bike exceeds 20 MPH C1, 28 MPH C3, it would be considered a motorized vehicle that requires insurance. I ride a motor scooter and my bicycle to work. The ride to work on the bicycle is more peaceful. People in general are better drivers than you give them credit for. Commuting does change the relationship with cars and perception when compared to weekend warriors. Funny thing is that my motorcycle gear is cheaper to buy than bicycle gear.