Police said the hundreds of dollars raised from the auction will go back into the area through the police department's community relations fund.
Residents were able to bid on bikes for about $10 or $20 at the parks and rec parking lot.
Some bought multiple bikes so they could repair and resell them.
It was Officer Daniel Gastia's first time running the event. He acted as the auctioneer. Officer Gastia said people jumped in to help him move the bikes while he was auctioning them off.
"It was really great to have individuals in the community just volunteer," said Officer Gastia, who is also the Community Relations Officer for the Bangor Police Department. "They just came right up and started handing me bikes, so it made it go a lot smoother and everybody seemed to really come together."