Dutch bank Rabobank will end their sponsorship of professional cycling from December 31 following the Lance Armstrong doping revelations.
The United States Anti-Doping Agency last week published an extensive report into allegations against Armstrong, concluding that he engaged in "serial cheating" and his US Postal Service team ran "the most sophisticated, professionalised and successful doping programme that sport has ever seen".
Bert Bruggink, a member of Rabobank's managing board, said: "It is with pain in our heart, but for the bank this is an inevitable decision. We are no longer convinced that the international professional world of cycling can make this a clean and fair sport. We are not confident that this will change for the better in the foreseeable future."