Electric city bike – the key equipment of an e-bike includes the electric motor, battery and LCD display with pedalling assist power control functions. The motors are mounted centrally, in the front or in the rear wheel. They support the cyclist up to a speed of 25 km/h. An aluminium frame designed for an upright riding position, comfortable urban saddle, luggage rack, mudguards, lighting and 28″ wheels are all features of the city bike. The main transmission system includes traditional external derailleurs or planetary derailleurs in the rear hub.