Bicycle units played a remarkable role in the Japanese Army during World War II.
I am confident that we will eventually see them as a Rider class at Enlisted.
And Japan was not the only country that used bicycles.
Each country had mechanized (LOL) units that used bicycles as their primary means of transportation.
They saved serious logistics and were active as reconnaissance, surprise, cavalry, and engineering troops because they had faster movement speed than infantry.
The U.S. 25th Infantry Regiment during a bicycle exercise at Fort Missouri Garrison, Montana.
A bicycle company of the British 36th Division on the Western Front.
An Italian Army Bersaglieri unit during World War I.

A German bicycle unit during operations in Latvia. An MG34 light machine gun, machine gun ammunition boxes, and hand grenades are strapped to a bicycle.