If you had a group on bikes pursued by a group in a car, would you run it as an Extended Challenge pitting the cyclists' Athletics rolls against the driver's Driving rolls? Or would the cyclists need Driving as well, perhaps complemented by their Athletics?
Would it be a game of players and GM competing with Declarations to accumulate advantageous Aspects to represent alley chokepoints, traffic conditions, etc.?
Would the bicycles themselves be Resources Declarations which can be free-tagged once, and then subsequently in exchange for Fate Points? Do they even count as anything other than a justification for pitting Athletics against Driving?
Strands of Fate has some intravehicular conflict rules, but they don't go smaller than motorcycles.