25.08.2011 Gruber Antrieb GmbH & Co KG introduces VIVAX – A REVOLUTIONRY CONCEPT ....more 22.08.2011 New brand – new booth: Gruber introduces vivax – the revolutionary concept ....more

The lightweight specialist

The ultra-light electric motor is unique in terms of aesthetics and function. Build invisibly into the seatpost, the 200 watt motor works directly on the crank. Since the motor comes as a retrofit kit you can install it in nearly every kind of bicycles. You barely even notice the additional weight of just 1.8 kg for the drive unit including the battery. Thus the worlds lightest mountainbike under 10 kg was born. The bike works as normal when the motor is switched off. Freewheel assembly means there is no resistance and you can continue to use the bike as sports equipment.