While only Patrik Sinkewitz, who was banned for a year in November for a failed drugs test, has admitted doping, Professor Werner Franke believes far more were involved.
"According to information I have, the entire T-Mobile team went to the University Clinic Freiburg and resorted to blood transfusions," Franke told a German radio station.
"This information is considered so compromising that for the moment there has been no inquiry."
Tour de France 2005
Kloden quits Tour
20/07/2005 AT 12:22
1997 Tour winner Jan Ullrich was sacked by T-Mobile after the 2006 event after he was linked to the doping network of Spanish doctor Eufemiano Fuentes.
T-Mobile won the team's title at the 2006 event with their top rider Andreas Kloden, who finished third on the road but was later promoted to second when Floyd Landis was stripped of his title for doping.
The telecommunications giant ended it's involvement in cycling in November and the team now exists under the name "Team High Road" with Australian Michael Rogers - a member of the 2006 squad - still on board.
Rogers has always strenuously denied doping.
Tour de France
Slipstream ready for Tour challenge
21/03/2008 AT 14:44
Tour de France
Landis makes final stand
19/03/2008 AT 07:52