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Motor

What kind of motor does the bike have?

All Ampler bikes have a small geared hub drive with a brushless DC motor, branded by Ampler. Brushless DC motors mean, that there are no brushes between the stator and the rotor. This makes the motor efficient and means that there are no wear parts in need of replacement, making it essentially service-free

The motor has a nominal power output of 250 W, but it can be tuned up to 350 W via our smartphone application. The peak power output of the motor is about 450 W. The motor is compliant with all European regulations.

Operating the motor requires sophisticated electric systems. We’ve custom-developed a control board, which ensures smooth and quiet operation even at high power levels. The hub motor includes double gear reduction which allows it to offer a maximum torque of 40 Nm at a motor diameter of just 120 mm, making for a high power-to-weight ratio while keeping the looks inconspicuous.

What is a torque sensor?

Ampler bikes are pedelecs and they have sensors regulating the motor, measuring the speed and your own input. Therefore, the bike is easy to use and the motor power is controlled according to your own pedalling force. This creates a safe and smooth riding experience.

Is there any motor resistance?

The motor has a built-in free-wheel, which means that there’s no resistance from the motor when the motor is not helping (for example, when your battery is empty or when you’re going faster than the assistance speed limit you’ve set).

Does the motor recuperate energy?

No, it does not.

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