Astana riders set off from Breckenridge aboard their usual Specialized S-Works Tarmac SL4s (James Huang/BikeRadar)

The USA Pro Challenge is one
of the last stops on the calendar for the 2012 road season with the towering
mountains of Colorado putting many of the riders higher above sea level than
they’ve ever been outside of an airplane. Here’s a look at what some of the
riders are using as they make their way to the state capitol of Denver.

Check out the gallery at right for 90 images of bikes and gear from the race.

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