They spend every waking moment training, playing, competing in the dirt. Take a look into the high octane lives of twelve professional off-road motorcycle riders in the most grueling, gnarly and incredible tracks and trails on the planet.
简介： They spend every waking moment training, playing, competing in the dirt. Take a look into the high octane lives of twelve professional off-road motorcycle riders in the most grueling, gnarly and incredible tracks and trails on the planet.
