10. Ann Arbor, Mich.
Percentage of bicycle commuters:
It has to be tough pushing bikes in a state that leans so heavily on the automobile, but if any town in this state can do it, it's Ann Arbor. With a huge bike-friendly student population courtesy of the University of Michigan and a city council willing to give bikes room on nearly half of Ann Arbor's roads, this is exactly the kind of Michigan community where a bike would be welcome.
The city council has put 5% of its state gasoline and weight tax revenues toward decidedly non-car transportation improvements, particularly on-road bicycle lanes.