Tour de France runner-up Christopher Froome has taken the overall lead in the Tour of Oman, after finishing second in the fourth stage on Thursday.
Britain's Chris Hoy produced a late surge to overtake three riders and win the men's keirin title on the final day of the world track cycling championships Sunday.
Defending champion Chris Horner and three-time winner Levi Leipheimer are expected to be in the field for the 2012 Amgen Tour of California, which is scheduled for May 13-20 and is expected to include about 140 of cycling's top riders.
American rider Chris Horner has pulled out of the Tour de France, a day after breaking his nose and sustaining a concussion in a crash.
Levi Leipheimer and Chris Horner realize the dark side of cycling is the only side many people can see these days.