Colombia's Rigoberto Uran Uran is seen at the start of the individual mountain time trial during the 18th stage of the Giro d'Italia, Tour of Italy cycling race, from Mori to Polsa, Thursday, May 23, 2013. Italy's Vincenzo Nibali won the individual mountain time trial in the 18th stage of the Giro d'Italia on Thursday to extend his overall lead. (AP Photo/Gian Mattia D'Alberto)
Colombia's Rigoberto Uran Uran is seen at the start of the individual mountain time trial during the 18th stage of the Giro d'Italia, Tour of Italy cycling race, from Mori to Polsa, Thursday, May 23, 2013. Italy's Vincenzo Nibali won the individual mountain time trial in the 18th stage of the Giro d'Italia on Thursday to extend his overall lead. (AP Photo/Gian Mattia D'Alberto)