Frank Stacy raced professionally in motocross, Supercross & world Enduro and then was hired by Dunlop Tire Corporation as a ‘certified test rider’ traveling world-wide. With his racer background and an engineer desire to know every aspect of off-road tires, he became known as the ‘tire guru’. He created Flat Tire Defender, a high density foam insert designed to protect the rim in todays world of off-road mountain biking.