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2

Cycling power is frequently measured is in watts. To know how much power the rider needs to contribute to a 20 mph speed over 50 miles you need to know: How much power is needed to sustain 20 miles per hour for 50 miles under the conditions (wind, hills, elevation, etc.) Subtract the power contributed by the electric motor What's left is the amount of power ...


2

Depends on how much the “light assist” setting actually assists. To ride 32km/h (20mph) on flat terrain with a road bike in road bike clothes you need about 170W to 210W. With a city-bike or mountain-bike and baggy clothing it’s much more. I think most eBikes have – depending on jurisdiction – at least 250W of motor power, so physically the motor would be ...


5

In order to ride at an average speed of 20 mph, especially when riding on the light setting you can't go at 20 mph on uphills. This means you need to go much faster than 20 mph on the flats. Let's say 22 mph on the flats would be enough. That's a whopping 35.4 km/h. Even on a road bike riding position (CdA 0.45 square meters) and using fragile low rolling ...


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