Berlin - Lance Armstrong won't race in the 2010 Giro d'Italia, instead preferring to compete in the Tour of California.

The 38-year-old American finished 12th in this year's Giro for Astana after coming out of retirement and the seven-time Tour de France winner has since set up a new RadioShack team for next season.

The California race begins May 16 while the Giro starts on May 8. (dpa)