Kittie Knox was a cyclist during the bicycle boom of the late 19th century. She was biracial and became known not just for participating in a predominantly white sport, but also for the clothes she wore to do it.
Research:

SYMHC Classics: Redpath Murders
32:44

Behind the Scenes Minis: Piece of Work
17:48

E. Virgil Neal: Hypnotist, Fraudster, Tycoon, Part 2
41:22