Kristin Armstrong of U.S. has surgery

KUNA, Idaho -- Olympic gold medalist Kristin Armstrong is confident she can overcome a shoulder injury to earn a spot on the women's cycling team for the London Olympics.

Armstrong crashed her bicycle Thursday night in Boise, Idaho, during the first stage of the Exergy Tour, a final tuneup for riders competing for slots on the American women's team.

She underwent surgery Friday and had pins installed in her clavicle but was back at the finish line in time to see Exergy 2012 teammate Theresa Cliff-Ryan cross the finish line in first place, her arms raised.

Armstrong told reporters she's still counting on being on the U.S. Olympic team when USA Cycling names London-bound riders on June 15. She said she'll be riding a stationary training bicycle this weekend.

"My chances are not gone," Armstrong said. "I have nine weeks until the Olympics. I'm going to come back stronger than ever. This injury is not going to keep me from going to London."

Steve Johnson, president of USA Cycling, declined to speculate on how Armstrong's exit -- and subsequent inability to compete head-to-head against rivals Amber Neben and Evelyn Stevens -- would figure into the organization's selection of riders in three weeks.

"Selection to the Games is never simple," Johnson said. "I would expect the committee to nominate those athletes they believe to be best prepared for a medal-winning performance in July."

Armstrong has a big believer in her corner: Connie Carpenter, winner of the 1984 women's road cycling gold medal at the Los Angeles Games.

Carpenter said Armstrong's injury was a setback that complicates the Olympic calculus, but it's not insurmountable.

Carpenter doubts that Armstrong's absence from Saturday's time trial in Idaho will have much impact on the team selection. For one thing, the 18-mile race in London is nearly twice as long as Saturday's event.

"It's not Olympic distance," Carpenter said, adding that Thursday's accident likely will bolster Armstrong's resolve to repeat her 2008 Olympic performance. "If anything, it will motivate her. It will only make her stronger."

Though the U.S. only will field two female competitors for the time trials in London, it's hoping to be among the world's top-five teams that get to nominate four riders for the longer road race. There's strength in numbers, a big advantage in strategy against national teams allowed only two or three riders.

On April 22, the most recent rankings release by the International Cycling Union, the U.S. women were ranked fourth, behind the Netherlands, Germany and Italy.

The international standings aren't likely to change much, said USA Cycling spokeswoman Andrea Smith, even with Armstrong's exit from the Exergy Tour keeping her from helping to add to totals.

"Our points are likely even a little stronger than they looked [on April 22]", Smith said, citing strong American performances in races since then.

Information from The Associated Press was used in this report.