Preidler, who was part of the French elite team Groupama-FDJ, told the Kronen newspaper that he could not 'live with this secret any longer' after skiers from Austria, Kazakhstan and Estonia were arrested last Wednesday in anti-doping raids in the Austrian resort of Seefeld.
Preidler had now left Groupama-FDJ, the French outfit said in a statement on Monday, adding that the rider, who joined in 2018, had admitted having 'blood taken' that year.
The raids were part of a broader operation targeting a Germany-based criminal organisation suspected of having carried out blood doping for years.
A 40-year-old sports doctor was believed to be at the centre of the organisation, police said last week.
"I made a doping confession (to the police)," the 28-year-old Preidler, a triple time-trial national champion, said.
Preidler, however, said that some of his best results, such as a third-place finish in a Giro d'Italia mountain stage in 2016, had been achieved clean.
(Reporting by Julien Pretot; Editing by Clare Fallon)
