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Top Speeds Explained


Why can't we list the top speed on our product pages?

Some advertising platforms will not allow any product page to advertise a top speed faster than 15 mph for electric vehicles.

Class 2: Throttle only top speed 20 mph

All of our e-bikes have a throttle. This is either a twist throttle or a thumb throttle located on the handlebars. When the throttle is used, the e-bike can be propelled without the rider pedaling - similar to a motorcycle.

 In the USA the regulations state that the maximum speed allowed in this kind of operation is 20mph although the e-bike may be technically capable of going faster than 20mph.

All Juiced e-bikes arrive set to Class 2 however the user can manually configure other assist settings.

Class 3: Pedal Assist top speed 28 mph

Class 3 e-bikes allow the bike to assist riders up to 28 mph when the rider is turning the pedals. When the e-bike reaches 28 mph, the motor assistance will be reduced until a speed of 28 mph or lower is maintained. Class 3 is a much more enjoyable way to experience the e-bike as it is closer to the speed a fit cyclist can achieve without motor assistance.

Note: When throttle is used and the rider stops pedaling, the speed of the e-bike will gradually be reduced to the throttle only speed of 20 mph. If pedaling is resumed, the e-bike will again accelerate until 28 mph is reached.

Race Track Mode: Top speed is not limited

When operating the e-bike on private property or a closed circuit race track, Race Track Mode can be selected from the LCD display. This assist mode works similar to the Class 3 operation, however, the 28 mph speed limit is removed and the system’s power levels are increased to the highest levels possible. 

In Race Track mode, the maximum speed may be faster than 28 mph depending on many factors such as rider strength, tire pressure, wind, and ambient temperature. The final top speed depends only on the power available to the motor + the rider’s pedaling efforts.

In Race Track Mode, the system’s power will be increased significantly. As the electronics are working under load, the system’s temperatures will increase, however, onboard sensors will automatically reduce the power if necessary to maintain the reliability of the electronics.

Note: Throttle-only speed remains limited to 20 mph even in Race Track mode for all bikes with the exception for HyperFat and HyperScrambler which is limited to 28mph.

Other Factors Affecting E-bike Top Speeds:

    • Wheel Size

    This is the outer diameter of the tire. Bicycles are classified by the tire size 20”, 24” 26” 28” for example. 28” wheels are also commonly called “700c.”

    Motorcycle and automobiles are classified by the rim size not the tire size so this can lead to some confusion.

    • Voltage

    This is the nominal voltage of the battery pack. In general, higher voltage will result in higher performance compared to a lower voltage system.

    • Motor Power

    The motor power is the rated power of the motor. The motor power for street legal e-bike is limited to 750W per regulation. This is why most e-bikes are advertised as 750W.

    Some of our e-bikes have higher than 750W. These are classified as Off-road vehicles similar to gasoline-powered dirt bikes and are not legal to ride on public roads.

    • Controller Amperage

    The Amperage is the amount of current the motor controller can send to the motor. In general, a higher amperage will result in more acceleration and top speed.

    To actually achieve the rated power stamped on the motor, the controller must be able to deliver enough current. Some e-bikes are advertised with a “750W” motor, however the electronics are not actually capable of delivering the current necessary for the motor to reach 750W performance.