Urban: Original design refined for modern cities. The minimalist 2 speed C Line. Simple set up - lighter weight. For flatter cities or strong legs in hilly places.Handmade in small batches and available just a few times a year. Black Edition is inspired by riding in the city at night and new ways of seeing the familiar. The all-steel C Line is offered in four Black Edition colours, powder-coated in-house at the Brompton London Factory.