Ordinary, Penny Farthing, High Wheel bicycle. The Ordinary bicycle evolved from the velocipede. The front driving wheel grew from 40 inches to 60 inches in diameter with the average size at 52 inches. The size of the front wheel was determined by a riders inseam or leg length . The front wheel was the bicycles "gear". The larger the front wheel the faster/further the bike would go per revolution.
As the the new chain driven safety bicycle (circa 1885) began to dominate the market any bicycle with a large front wheel was referred to as an "Ordinary". Later, as a mostly derogatory term, the term Penny Farthing (two British coins of different size) was coined. It is also referred to as a High Wheel. (1872 - 1892).