On Sunday, 32,000 cyclists will pedal through New York City in the annual TD Five-Boro Bike Tour. The 40-mile ride is the largest urban bike tour in the country. The Staten Island-bound lanes of the Verrazano-Narrows Bridge will be closed until 6pm and parts of the Brooklyn-Queens Expressway and the Belt Parkway will also shut down for most of the day. This year — the event’s producers created a three-day bike expo as a prelude to the tour. Ben Bradford is there now, down at Pier 36 on the Lower East Side.