MA1 is a advanced electricmoutain bike model. Except most of its main parts are made by aluminum alloy. The battery is specially designed and embbed in alluminum alloy frame, and wires are also routed in frame. Most attrative part is its integrated motor at the bottom bracket. Unlike rear wheel motor, torque sensor motor provides smoothier and comforable riding experience. Besides, it reduces electric power loss to increase riding mileage. Equipped with SHIMANO MT200 hydraulic disc brake and M3000 9 speed shifts, MA1 is the best choice for advanced outdoor player.