 The decision by Nib was not entirely surprising. Her specialty is the triathlon, and the two-time defending women's Ironman world champion has long planned to compete in that event at her second consecutive summer games. The 26-year-old from Washington, D.C., was the surprising winner of the U.S. Time Trial Championship earlier this year, earning an automatic spot alongside Chloe Digert in the Olympic road race and time trial.