Shimano STEPS DU-E8000 Class 1 Drive Unit (20 mph max) - The Shimano STEPS DU-E8000 Drive Unit is a compact drive unit designed for MTB riding styles.Includes 2 E-tube ports for Shimano E-Tube Project communicationIts compact size allows for a shorter chain stay and more clearance with the suspension and tireLight weight improves bike handlingMax rated power = 250 watts, Max torque = 70 NmOffers a direct pedaling feel both on and off power assist modeStable assist power output