Progressive American Flat Track is America's original extreme sport as well as the guardian of the Grand National Championship series, formally established in 1954 but with roots reaching back to motorcycling's original speed demons of a century ago.At its core, professional flat track racing is a hyper-competitive, adrenaline-fueled American motorcycle sport featuring custom-built and production-based motorcycles reaching top speeds of 140mph on the straights and 90mph in the corners, all piloted by world-class athletes.Progressive AFT is widely recognized as the most prestigious and competitive form of dirt track motorcycle racing in the world. Much has changed over 100 years, but the sport remains perhaps motorsport's purest test of man and machine.