"Are you looking for Razor Ecosmart Metro Parts or an electric scooter 16 inch wheels? You're in the right place. The rear wheel with a hub motor for Razor Ecosmart Metro HD, and Ecosmart Metro SUP electric scooters is a complete kit that combines the 350-watt, variable-speed, high-torque, brushless, rear-wheel hub-driven electric motor with a 16 inch (406 mm) pneumatic tire and an inner tube with an angled valve stem. In addition, this superb piece of modern e-bike design sports a silver-colored rim and an 80 mm band brake. Using an electric hub motor as part of an ebike's wheel assembly is an old idea that is enjoying a new renaissance of popularity. These hub motor/drive wheel units offer driving power in a relatively small lightweight package for adults. Specifications Tire size: 16x2.125"" Tread: KF828 Pressure: 40 PSI Brake drum diameter: 80 mm Motor wattage: 350W"