New Progressive Powertrain The Surron 4th generation powertrain was designed uniquely for Ultra Bee Black Version. Its special full isolated electrical architecture can steer clear of prospective interference concerning large and low voltage circuit factors.The combination of 74V55AH battery pack and 12.5KW / 440N.m torque drivetrain will make Ultra https://sites.google.com/view/surron-2025/home