Curve Extreme Sport is a skateboard-like concept design aiming to start a new trend of extreme sport. The Curve uses tapered Motor GP-like wheels to allow boarders to take ultra sharp turns at high speeds. Since the wheel is so thin, there is minimal friction, which means insane speed.
Unlike the traditional four-wheeled skateboard, the Curve only has two wheels, allowing the board to ride in a line, rather than a squared flat surface. These wheels allow for some extreme riding with crazy maneuvers and lots of broken bones.
— Andrew Dobrow