Erdmann switched to bobsleigh in 1998, competing both at the Winter Olympics and the FIBT World Championships. She won three medals in the two-woman event at the World Championships, with two gold (2003, 2004) and one bronze (2001). Erdmann also won the overall two-woman Bobsleigh World Cup championships for the 2001-2 and 2002-3 seasons. Her coach was Wolfgang Hoppe, who won several medals in bobsleigh during the 1980s and 1990s when he competed for both the East Germans and the Germans following 1990 reunification.