The newly developed GRUBER Assist bicycle motor consists of five components:

• On/off switch
• Electronic control
• 200 watt powered drive unit with free-wheel
• LiION Mangan battery pack 4.5 Ah / 30V
• External battery charger

The auxiliary drive, with a length of almost 22 cm and 200 watts of power, is permanently connected torque-proof with the drive shaft of the foot pedal through a bevel gear unit; gear changing is still possible. At an optimal pedal frequency of approx. 60 pedal revolutions per minute, the bicycle drive provides the rear wheel with up to 100 watts.
The entire drive unit (motor, transmission, electronic control) weighs no more than 900 g. The LiION Mangan high-performance battery, which fits into a conventional saddlebag, provides you with motor-assisted cycling lasting for min. 45 minutes, depending on how hard you pedal. It weights just 1000 gr., has a charge level indicator and active balancing.
The special design of the drive unit allows it to be built into any bicycle frame with the requisite seat tube internal diameter of 31.6 mm and is therefore not visible on the bicycle – except the on/off switch, which is unobtrusively located at the end of the handlebars.

For our technology-interested customers – everything about installation and technical details:

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