College student Carter Hurd has discovered 3D printing and is integrating it into his long-time passion for building robotics. His first 3D printed project is the transforming wheel. Meant to help robots navigate terrain whether inside or out, his first 3D printed project was inspired by the shape and design of the orange and its peel. The transforming wheel was printed on a MakerBot 2X and features Arduino software. Read more in the full article: http://3dprint.com/23604/transforming-robot-wheel/

Below is an image of the wheel/spike: