Built for adventure, the BakcouA(R) Mule E-bike is designed to tackle rugged trails, steep inclines, and long treks with ease. Powerful battery pedal assist gives you the confidence to go farther and carry more. Bafang Ultra 750w/1000w Mid-Drive Motor with Integrated Torque Sensor Integrated Battery 52v - 20ah Lithium-Ion Battery with 52v / 4amp Smart Charger Dual Battery Option: Add an extra 15ah or 20ah battery to extend your distance with fully integrated rear rack system Inverted high-performance 120mm AIR front fork Comprehensive On-Demand Programing: Effortlessly switch between E-Bike classes (pedal-assist, throttle-assist, speed limits, etc.) BAKCOU Connect: Health, Location and Security (with annual subscription) SRAM NX Hill-Climbing 11 speed, 40t Front Chain Ring, 11x42t Rear Cassette