The penny-farthing was a popular type of bicycle in the 1870s and 1880s. The huge wheel allowed each pedal revolution to propel the bicycle a larger distance, as well as a smoother ride over the period's cobblestone streets and uneven roadways. However, steering was difficult because of the large radius of the front wheel. People rode penny farthings differently than they do today. Back then, there were no helmets, so riders wore caps or hats while out on their bikes. They also wore tight-fitting clothes that covered their arms and legs. When walking home from school or work, girls would often walk with their friends, who would hold hands. Boys would usually go home alone because there was no way for them to get home safely without hurting themselves. Penny farthings were very expensive back then; a good quality one could cost up to $500. These bicycles shaped the world we know today: oil-free engines powered by human energy! Although they are rare these days, you can still find old penny farthings at auction houses across the country.