He began producing the Rover Safety Bicycle in 1885. Overman were the first American manufacturers of the safety bicycle. One example is the Protean two-speed derailleur available on the Whippet safety bicycle. Two new developments changed this situation, and led to the rise of the safety bicycle. The poem actually featured the Safety bicycle. In 1885, Starley made history when he produced the Rover Safety Bicycle. In 1885 John Kemp Starley exhibited his Rover Safety bicycle at the Stanley show. He invented the first successful light farm tractor, and the Ivel Safety bicycle. Despite its higher price, Overman's safety bicycle quickly became a sensation. John McCammon, of Belfast, developed an early safety bicycle in 1884. The safety bicycle gave women unprecedented mobility, contributing to their emancipation in Western nations. The safety bicycle was a big improvement on the previous penny-farthing design which it replaced.