Achieved popularity by replacing two-wheeled models with three-wheelers. The most successful dicycle was invented by the Englishman E.C.F. Otto during the heyday of the ordinary cycle in 1880. Its two large wheels placed side by side were driven by a left and right pedal. The vehicle enabled smooth turning by relaxing the pedal on the side of the turn so that the wheel on the other side spun faster. Compared to the ordinary cycle which placed the rider high in the air, the dicycle offered a more stable feeling, placing the rider between the right and left wheels. This high degree of safety made it a hot topic as the vehicle of the times. Upon the introduction of the dicycle, the Birmingham Small Arms Company (BSA) in England almost immediately produced 1,000 of these vehicles.