This 8th revision of the Juggernaut brings numerous improvements over previous models. We continue to innovate, showcasing an integrated battery and motor, suspension fork and much more. This is the first electric fat bike that has a custom Bafang BBSHD motor built into the frame - more ground clearance than any other BBS powered ebike.The Juggernaut Classic HD comes with throttle-on-demand and Cadence/PAS (Pedal Assist Sensor). As you pedal, the motor measures how often you're pedaling and the sensor assists you, so you spend less energy. You can boost motor performance by setting the pedal assist between 1 of 5 levels; level 1 gives you least assist but most range, while level 5 gives you maximum assist and least range. The levels of assist can be set to 1-3, 1-5 or 1-9 levels using the settings on the display.