What is the biggest biking city in the world?

Could you please elaborate on the criteria used to determine the "biggest biking city in the world"? Are we referring to the number of bicycles per capita, the length of bike lanes, the number of bike-sharing programs, or perhaps the overall cycling culture and enthusiasm among residents? Additionally, is there a specific methodology or study that has been conducted to identify this city, or is it a subjective assessment based on various factors? I'm curious to know more about how this designation is determined.