In August, Heelys will start selling its Nano, a sort of one-foot skateboard that snaps onto the brand’s Fats and Mega Heelys shoes. The user just snaps out the wheel on the shoe, and the wheel’s bracket fits onto the Nano with Heelys’ Sole-Link technology. The boards are about 15 inches long and 7 inches wide, and will sell for $79.95.