Reports of early forebears of the bicycle were "velocipedes", and included many human-powered vehicles. During the 1870s advances in metallurgy led to the development of the first all-metal velocipedes. The first bicycle "tires" were iron bands on the wooden wheels of velocipedes. A modern linguistic parallel is "velodrome", an arena for velocipedes. With this MTD began to manufacture pedal bikes, velocipedes, kiddie cars and playground equipment. Various improvements on velocipedes came both from Jesse and his father. Johnson made at least 320 velocipedes in the early part of 1819. Some officers rode in buggies and others rode velocipedes. Their wood and iron construction earned these velocipedes the sobriquet "Boneshakers". Airless were used before pneumatic tires were developed, appearing on velocipedes by 1869. The event was for velocipedes, crude wooden machines with pedals on the front wheels. Velocipedes were "in common use" by 1875. However, in 1866 Paris a Chinese visitor named Bin Chun could still observe foot-pushed velocipedes.