After testing more than 200 electric scooters over the past six years, we can confidently say the Roadrunner RS6 Ultra is the fastest 60V scooter we’ve ever reviewed. Powered by dual 1500W motors and a 60A sine wave controller, it reached 58.5 mph in our real-world test, blasting from 0 to 15 mph in just 1.77 seconds and flying up steep hills in 6.35 seconds. Stability is equally impressive thanks to adjustable KK hydraulic suspension, 11×4” PMT racing tires, and a steering damper that keeps the scooter planted even at top speeds. Add in a sharp 4.5” TFT display, Nutt hydraulic brakes, and Roadrunner’s futuristic “Road Glow” lighting, and the RS6 Ultra feels like a complete high-performance package.