Jess Zimmerman clocks it:

We don't want to underestimate Americans' ability to buy things they don't use, but bike sales were up 9 percent this quarter. There was an even bigger jump — 29 percent — in sales of road bikes, implying that people are using their new vehicles to commute. … The federal government has invested $2 billion in bike lanes over the last two years, and several cities have instituted bike share programs or expanded bike lane networks (New York City added more than 50 miles).

A.K. Streeter applies the brakes a little by citing a new study:

Almost all the growth in cycling in the United States has been among men between 25 and 64 years old, while cycling rates have remained steady among women and fallen sharply for children.

(Photo by Flickr user Kicki)