Transcript: Transform your manual bike into an electric bike. Rubbee X is an attachable smart motor that touches the rear tire of a bike to provide motor assistance. The quick release technology allows you to install and detach Rubbee with one hand. When going downhill the batteries can regenerate, giving the rider more juice to reach their destination. Rubbee has a top speed of 20 mph. When fully charged, Rubbee has a range of 30 miles.