Excelsior Motor Manufacturing & Supply Company

In 1912, an Excelsior was the first motorcycle to be officially timed at a speed of 100 mph. The Henderson Motorcycle Company became a division of Excelsior when Schwinn purchased Henderson in 1917. The Great Depression convinced Schwinn to order Excelsior's operations to cease in September 1931.

The mainstay of Excelsior production through the 1910s and into the 1920s was the 61 cuin Model BigX. This had an inlet-over-exhaust v-twin engine, first with belt drive then with 2 speed and then 3 speed gearbox. Colors were grey with red panels in the early teens, the 'Military Model' of the late teens was in khaki (a green-brown shade) and 1920s models were in a very dark blue with fine gold pinstriping. Many were exported, Europe and Australia receiving a number of shipments. A very small number of BigX motorcycles were manufactured with 74 cuin engines in the 1920s. Production of the BigX continued until 1924, when it was replaced by the Super X.

Excelsior released its Super X model in 1925. The Super X was America's first motorcycle with a 45 cuin V-twin engine. The Super X was conceived as a competitor to the smaller Indian Scout. In response to the Super X's popularity, Indian first raised the Scout's capacity to 45 cuin and then introduced the new Indian 101 Scout, while Harley-Davidson introduced their 45 cuin motorcycle, the Model D.

In 1929, the stock market crash and the resulting Great Depression caused motorcycle sales to plummet. The summer of 1931 saw Schwinn call his department heads together for a meeting at Excelsior. He bluntly told them, with no prior indication, "Gentlemen, today we stop." Schwinn felt that the Depression could easily continue for eight years, and even worsen. Despite a full order book, he had chosen to pare back his business commitments to the core business of bicycle manufacture. All motorcycle operations at Excelsior ended by September 1931.