 She won the women's road race in the UCI Road World Championships in both 2010 and 2011 and the women's points race in the UCI Track Cycling World Championships in 2009.She has taken a total of 80 victories on the road and the track, including stages of the Giro Rosa, the Route de France Féminine, the Tour of Qatar, the Tour of California, and the Tour of Chongming Island.After a 16-year career, in August 2018 Bronzini announced that she would retire at the end of the season and become a "directeur sportif" with Trek Bicycle Corporation's new women's team in 2019.