Another Video:

 Darin Schultz has invented a way to spin your pedals year round. He calls it the 4dsnowbike and he says he can ride just about anything. On February 19th, 2008, he proved it, cutting some turns at the top and then straightling down 12,392 ft Highlands Bowl in Aspen, Colorado.

Highlands Bowl:

His invention is not only for going downhill. Just about any snowfield is fair game. And when the snow runs out, the tires roll right onto the pavement. You can get more info about this new way to ride all winter at 4dsnowbike.com.