Wide Compatibility: This throttle for super 73 fits 22-23mm round handlebars and works seamlessly with Super73 S1/S2/ZX/RX/Z series and most 48V/52V electric bikes/scooters. The universal 3-pin connector ensures easy installation Durable & Waterproof Design: This thumb throttle is crafted with high-impact ABS plastic housing and an IP65-rated waterproof connector, it resists dust, splashes, and harsh weather conditions for long-lasting performance Precise Speed Control: The ergonomic thumb lever delivers responsive acceleration and braking, allowing riders to accurately adjust speed for a stable and safe riding experience Plug-and-Play Installation: No tools or complex steps required! Simply unplug your old throttle and connect this new thumb throttle Lightweight & Ergonomic Design: Compact and lightweight construction reduces handlebar clutter, while the palm-friendly curvature ensures comfort during long rides and enhances control flexibility 1