The Duo Series. Ebikes for Everyone.The Juggernaut Duo Series is all about flexibility. Hub-drive or mid-drive, step-over or step-thru, single battery or dual battery, entry-level or high-end. No matter your needs, there's probably a Duo for you. Watch this video to see how The 3 Duo models stack up. The next step in performance.Looking for a little more power, but don't want to break the bank? Meet The Classic Duo. With a 750W mid-drive motor, The Classic delivers a considerable performance boost without sacrificing affordability. Use the bikes gears to your advantage and tackle tough terrain with ease. Your adventure awaits.