Spotted these prototype solid disc brake rotors for extra muddy and gritty cyclocross applications over at cxmagazine.com. They were designed to give pro rider Ryan Trebon the advantage in the harsh conditions of the 2013 Cyclocross World Championships. I can also see them being a good choice for amateur riders as they prolong your pad life and could potentially save you money on brake pads with only a slight weigh penalty. Check out the original article HERE. Maybe we will see them popping up on more bikes next season.