Burlington, Vt., is a bike-friendly city. There are multiple bike stores, a network of bright green bike lanes on many major streets and a waterfront bike path with views of the dazzling sunsets over Lake Champlain and the Adirondack Mountains.Burlington’s bike culture and natural beauty convinced Julie Williams to settle there after graduating from the University of Vermont 10 years ago. She also liked the city’s progressive politics, which started the career of Bernie Sanders, a former Burlington mayor. “I feel like I fit in here,” said Ms. Williams, who operates Betty’s Bikes, which she named after her grandmother.But this spring, she noticed a troubling trend: A large number of people were calling the store asking …
