Tony Martin is "totally angry" over the UCI's reaction to Chris Froome's adverse drugs test and questioned whether the Vuelta a Espana champion and Team Sky have been given preferential treatment.
Cycling's world governing body has asked Froome to explain elevated levels of salbutamol in a urine sample taken during the Vuelta on September 7.
Froome had double the level of the legal substance he uses as an asthma sufferer in his system, but the four-time Tour de France champion was quick to point out he had not broken any rules.
A livid four-time world time trial champion Martin suggested other riders would have been treated differently to the Brit.
The German wrote on Facebook: "I am totally angry. There is definitely a double standard being applied in the Christopher Froome case.
"Other athletes are suspended immediately after a positive test. He and his team are given time by the UCI to explain it all. I do not know of any similar case in the recent past. That is a scandal, and he should at least not have been allowed to appear in the World Championships.
"Not only the public but also I have immediately the impression that there is wheeling and dealing going on behind the scenes, agreements are being made and ways are being sought as to how to get out of this case. Do he and his team enjoy a special status?
"These actions are major blow to the difficult anti-doping fight, which I am leading with riders like Marcel Kittel. We need a consequent and transparent approach by the UCI. What is going on here is inconsequent, not transparent, unprofessional and unfair."
Froome insists he did not exceed the permitted salbutamol dosage and believes the UCI is right to request more information from him.