We are a skateboard design team, called Stair-Rover. The Stair-Rover started as a dream "to surf the city", and after multiple design iterations, we have just made a new longboard to maneuver on the concrete wave. We add an engineered chassis to the traditional longboard to make it go over all urban terrain including some flights of stairs. You can have a look on our video: http://youtu.be/iK5dZiGgm5s
Our dream is bringing riders the fun of utilising gravity just like the surfers utilising waves. Any thoughts and feedback from surfers will be invaluable to us.
Hope you enjoy our experiment. We actually just launched this project on Kickstarter: http://kck.st/12bbLkx in order to take Stair-Rover to production line. If you can share it with your friends and community, that'd mean the world to us.