The Brief Mayor Zohran Mamdani announced a crackdown on online retailers he says are illegally selling e-bikes in New York City. The city has issued cease and desist letters to 42 online retailers it says are selling high-speed e-bikes that cannot legally operate on city streets. It comes after a 17-year-old riding an illegal, high-speed e-bike was killed in a crash last week near City Hall. New York City Mayor Zohran Mamdani announced Wednesday the city is taking action against online retailers accused of illegally selling e-bikes to customers in the five boroughs. They also come after last week's crash near City Hall that killed a 17-year-old who was riding an illegal, high-speed e-bike.