The “Black Rainbow” was the Bone’s Legacy entry into the 2013 Artistry in Iron competition, part of the Las Vegas Bikefest. Paul Ponkow’s creation is an epic throwback digger with a fantastic multi colored paint job and period correct styling right down to the invader wheels and Mondo front end. Powered by a twin carbureted 1973 T-R7 Triumph engine. Paint by Sonny Boy. The build consists of a 1973 Triumph engine with all the bling and more, transplanted into a wildly custom tank built into the fame digger.