The Premium i MD9 is equipped with the powerful mid motor with rotation sensor and the LCD console. Within this Premium Series, the Premium i MD9 is the only Premium i electric bike that has the Shimano Acera derailleur gear with shift sensor, which makes the driving experience sportier. This Premium i bike has a fully integrated battery, strong aluminum mudguards and artificial leather handles and saddle with stitching. These parts are nicely matched to the color of the frame and the bicycle tires.