Cycle Racing Association, Inc. Six-Day Bicycle Contract Signed by Roy Mobeck, 1922

Roy Mobeck of Chicago, Illinois, began bicycle racing as an amateur in the late 1910s. He participated in and won several local competitions. Mobeck turned professional in the early 1920s, and he competed in six-day races throughout the Midwest. These extreme endurance contests had cyclists riding continuously for six days with only brief stops for food or rest.