HORN aluminium plastic chain guard Catena A14e Bosch - high quality aluminium plastic chain guard for the Bosch eBike system MY2014 Comfort Line and Performance Line - The chain guard is clipped directly onto the motor housing at the front, an additional mounting adapter is not required. - Front drive chainring from 15-20 teeth - Infinitely adjustable lengths (390-420mm) - Rear attachment to the seat stay - Aluminium chain cover - Disc chainring and length adapter made of ABS - The chain guard can be mounted/dismounted in a few simple steps without removing the crank if required.