The top speed of a bike can vary widely depending on the type and context. For MotoGP bikes, the top speed ever recorded is 366.1 km/h , achieved by riders like Brad Binder and Pol Espargaro at the Italian circuit of Mugello. For average motorcycles, the top speed can range from 53-62 mph for 100cc bikes to much higher speeds for larger engines. For example, dirt bikes of 100cc can reach up to 60 mph, and more powerful motorcycles can achieve significantly higher speeds. In the context of cycling, the fastest speed ever recorded on a bicycle is 183.93 mph by Denise Korenek, though this was achieved with mechanical assistance and a slipstream. For road bikes, average speeds range from 15 to 20 mph, while professional cyclists can sustain speeds of 25-31 mph on flat terrain and reach up to 50 mph during sprints. For electric bikes, the top speed is typically limited by regulations, with Class 1 and Class 2 e-Bikes limited to 20 mph and Class 3 e-Bikes limited to 28 mph in the US. Thus, the top speed of a bike is highly dependent on its type, purpose, and the conditions under which it is ridden.