New Progressive Powertrain The Surron 4th technology powertrain was designed uniquely for Ultra Bee Black Version. Its special full isolated electrical architecture can avoid potential interference amongst large and small voltage circuit elements.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