This is the Rubbee X, a portable conversion device that turns a manual bike into an electric bike in just seconds. The Rubee X, made in Lithuania, easily clicks in and out of a mount on the bike’s seat post and can be detached and carried inside to charge the battery or to avoid theft.
The Rubbee X is positioned above the rear tire and is equipped with a powered rubber roller that presses against the tire. It has a pedal-assist sensor that provides electric assist automatically. It tracks the vehicle’s speed using the motor as a speed sensor and incorporates how fast a person is pedaling.
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Depending on the length of your ride, this innovative device can hold up to three replaceable batteries. It also has an integrated 14-LED brake light, turn indicator that also displays battery level. Power output can be increased to 350W and top speed to 32 km/h (20 mph).