Speed is an old god. Humans have been obsessed with the quickest way around a dirt oval since before Homer began uttering the first syllables of what would become The Iliad. It's a tradition older than the languages on our lips, and these days, it's played out on two wheels in both speedway and flat track races. The two were born in the dust of former British colonies. History credits the Australians for the madness of a speedway bike, and flat track brawlers are a uniquely American adaptation, but both sports owe their relentless relevance to their popularity in the United Kingdom.