The first world championships took place in 1921, though the only event that was contested was the Men's Road Race for Amateurs. The first professional world championship took place in July 1927 at the Nürburgring in Germany where Italian Alfredo Binda won the professional men's race and Belgian Jean Aerts won the men's amateur race. The women's road race was introduced in 1958. A men's team time trial, contested by national teams, was introduced in 1962. Beginning in 1972, the team time trial was discontinued in Olympic years only. Individual time trials in all categories were added in 1994, which was also the last year for the original incarnation of the men's team time trial. In 2012, the men's team time trial was reinstated, and a women's team time trial added to the program; both were contested by trade teams. In 2019, the team time trial events for men and women will be replaced by a mixed relay team time trial.