New Progressive Powertrain The Surron 4th era powertrain was designed uniquely for Ultra Bee Black Version. Its special full isolated electrical architecture can avoid possible interference amongst significant and low voltage circuit components.The combination of 74V55AH battery pack and 12.5KW / 440N.m torque drivetrain tends to make Ultra Bee https://open.substack.com/pub/foryourinformation1/p/unveiling-the-surron-ultra-bee-2025?r=4hwl1w&utm_campaign=post&utm_medium=web&showWelcomeOnShare=true