In what style is elevator pitch supposed to be? In the provided link the first concept is that you should know what your aim is. Is our goal to impress potential investors, competition judges or end users?
The elevator pitch will be judged by a small group composed of engineers and business development experts from the bicycle industry. From my perspective, the judges will look for the attractiveness of your design from the point of view of end-users and design-engineers who could potentially use your product design in their future models of e-bikes.