Mani Arthur, the founder of Black Cyclists Network, said he was “harassed and humiliated in a public space” in video of the incident.
The video he posted on Instagram showed the cyclist removing his shoes and being patted down by the police officer, who admitted he could no longer smell cannabis.
“After the search you don’t smell it?” laughed someone off camera.
“You might want to check under my helmet because I might have cannabis underneath it as well,” Mr Arthur said while being searched. “We don’t do the helmet,” the officer said.
“Are you satisfied that I do not have cannabis on me?” asked the cyclist after being patted down. The police officer said he was.
Mr Arthur saidthe officer approached him while he was waiting at traffic lights, slightly over the line where vehicles stop. He said he was asked to reverse, but that he told the officer doing so would have been dangerous.
He claimed the officer then called him back as he was riding off and told him he smelt cannabis on him during their conversation.
The cyclist was then searched for drugs.
“I am very annoyed at having to go through such a degrading and humiliating experience,” he said.
“It seemed to me like a gross abuse of power by an officer.”
Detective Superintendent Andy Cox of the Metropolitan Police's Roads and Transport Policing Command said: “While no formal complaint has been received about the incident, we have spoken to the officer involved to establish the exact circumstances and so any learning identified can be implemented.
“We will also endeavour to make contact with the cyclist involved to get their views.
“Metropolitan Police officers carry out hundreds of interactions with people throughout London every day and we welcome the fact that their actions are scrutinised so, where appropriate, they can be held to account.”
Mr Arthur is the founder of Black Cyclists Network, a group which aims to connect BME cyclists, and was on his way back from a group ride when he was stopped, according to Cycling Weekly.
He said the incident happened around 2pm near Euston Station in London.