The predecessor of USACycling, the Amateur Bicycle League of America (ABLA) was founded in 1921 and held National Championships starting that year. From 1921 to 1964, these championships were four-event omnium of track-style events,rather than a road race. USACycling souvenir programs list no results for events in 1931-1934, 1938, and 1942-1944. The 1939 program summarizes the 1937 National Champions, so it is likely that no championship was held in 1938.