Why different bikes?  Well, the Giro d’Italia’s stage 12 time trial is unlike any other TT in Grand Tour history.  First, it’s really, really long.  60.6km (37.66 miles) to be exact.  Second, it’s constantly up and down…there’s very little flat area for full on hammering in a tucked aero position.  Strong climbers are expected to fare better than dedicated time trial specialists.  So, what’s up with the bikes?  Well, they’re basically road bikes set up for time trialing…at least Lance Armstrong’s (above) and Levi Leipheimer’s (hit ‘more’) are.
Also after the break, a map and elevation profile of the stage 12 time trial course.  Hit ‘more’ to see them…
Above, an Astana team mechanic gets Levi’s road bike ready for time trialing.
Course map and elevation graphic from BikeRaceInfo.com.  They’ve got a play-by-play for each stage, with maps and graphics for each one.  Very cool.