Bike racers square off in Giro di San Francisco

September 6, 2010 1:46:58 PM PDT
A bike race in San Francisco is centered around Levi Strauss Plaza.

The day-long event draws hundreds of spectators and includes both professional and amateur cyclists.

The 36th annual Giro di San Francisco has seen some top-notch competitors in the past.

Three-time Tour de France winner Greg Lemond won the Giro di San Francisco twice in the late 1970s.