Urban electric bicycles typically have motors with power ratings ranging from 250 watts to 750 watts. The reason for this range is to strike a balance between performance, legal regulations, and efficiency.
The 250-watt motors are often chosen to comply with legal restrictions in many countries, including the European Union, where e-bikes are considered pedal-assist and are allowed to provide assistance up to 25 km/h (15.5 mph). This power level ensures that the e-bike still requires pedaling effort from the rider while providing a noticeable boost, making it suitable for urban commuting.
On the other hand, e-bikes with more powerful motors, such as 500 watts to 750 watts, are designed for steeper inclines, heavier loads, and faster acceleration. These might be preferred by riders who face challenging urban terrain or need more assistance for various reasons.