The legal limit for EBikes in South Carolina is 20mph while other states that define EBikes and use the federal 3-tier classification system limit EBikes to 28mph. Beyond these legal speed limits, the electric bicycle might no longer be defined as an EBikes and could be categorized as a motor vehicle such as a scooter, moped, or a motorcycle. In order to comply with state laws or rider preferences, many EBikes allow the maximum speed of an EBike to be limited by the on-board controller. EBikes Rider characteristics will also affect the top speed. Generally, the weight of the rider directly affects the speed of the EBike because the motor will have to work harder to maintain a certain speed for heavier riders. However, a 750Watt EBikes motor can maintain speeds of 20MPH easily for riders over 200lbs. The voltage and wattage of the EBike motor also affects the top speed. Most ebike motors fall between 250-750Watts. We carry both 36 Volt, 350Watt motors & 48 Volt, 750 Watt Motors. Both are equally capable of reaching 20MPH, however the acceleration on the 48V750W motor is much greater than the 36V750W motor.