The Tank Bike (tank motorcycle) is among the world’s biggest motorcycles. It was built in 2007 by a group of German biker blacksmiths from Harzer Bike Schmiede (the Harzer Bike Blacksmith Shop). The Tank Bike is made of 90 percent military scrap. At its heart is a 1,000-horsepower engine of a World War 2 Russian tank. The headlights are also from the Soviet People’s Army. It’s turn signal lights are made of cruise missiles.