How can a designer to anticipate the future of motorcycles and offer an appropriate response to the developments of our time and users, while respecting the demands of sustainable development? This approach was the starting point of the industrial designer Clement Lagneau. His proposal to resolve this interesting paradigm, rStream Our modern cities are completely congested and polluted and, of course, the use of two-wheeled vehicles to move through traffic has become widespread due to its ability to overcome the drawbacks cities. However, like cars, two wheelers have to participate in sustainable development and, in this sense, integrate the latest innovations in technology and use. rStream is an intelligent and sustainable electric motorcycle whose futuristic and sleek aerodynamic produces sound waves varying intensity depending on the speed of the vehicle during its run. For example, when the motorcycle runs through the city at low speeds, the mechanism of the vehicle produces a natural infra-bass sound. But when speed increases, so does the pitch of the emitted sound. This allows the pilot to get a good maneuverability, as well as the different agents in the environment a broader visibility of the motorcycle. To all this, Clément Lagneau also incorporated into the rStream model other practical benefits. Among these, it was included a storage compartment that replaces the conventional fuel tank and the new position of the engine, closer to the wheels than in conventional two-wheelers, which greatly improves traction and stability. In short, rStream motorcycle is a low-emission prototype that arises in response to current urban problems common throughout the world and, for their meritorious characteristics, is required to obtain a high score on sustainability.