Armstrong topples Wiens in Leadville 100 - Lance Armstrong prevails

Lance Armstrong has won the Leadville 100 in a record time, finishing the nation's highest-altitude mountain bike race on a flat tire.

Armstrong dethroned six-time defending champion Dave Wiens on Saturday, winning in 6 hours, 28 minutes, 50 seconds. Wiens had set the previous record of 6:45:45.

He had beaten the seven-time Tour de France winner by nearly two minutes last year. But that was before Armstrong began training in earnest for his return to the Tour this year.

Armstrong and Wiens were in a pack of pro racers that broke away early. The race featured 1,400 mostly amateur cyclists and began with snow-crested peaks as a backdrop.

Lance Armstrong Topples Leadville 100