The TREK Powerfly 4 has everything you need for an unforgettable adventure - from a powerful Bosch electric motor, to a Shimano shifting mechanism for precise and optimal gear selection, to a Purion control mechanism for optimum motor control. The robust aluminium frame will securely protect the 500W battery in all weather conditions and provide a wide range of reach, while the Bosch Performance CX (250Wm 85NM) motor combined with the Shimano 1x10 drivetrain will provide optimum support on steep hills or long rides.