👉 Hardtails are a type of street racing in which drivers compete against each other on a circuit, usually with a series of roundabouts and corners. They typically involve driving at high speeds, often up to 150 mph (240 km/h), and have been popular since the 1960s, particularly in the United States. The term "hardtail" is derived from the slang term for a hard hat, which was commonly worn by drivers during the era of motorcycle