Generally considered Dario’s finest masterpiece, the Responsorium is TIG welded of Columbus double and triple butted XCr stainless steel tubing. The highly polished ultra smooth surface of the tubing (Ra<0,4) is exceptionally resistant to stress cracking as well as corrosion. Repeated cold drawing reduces the main frame tube thickness to a very low 0.4mm for a buttery smooth ride that is unrivalled in comfort. The medium diameter rear stays provide the slightly springy snap and efficiency that only the rarest frames ever achieve. Ask our staff, every time they get on a Responsorium they are amazed. This is the ride tha made so many of our most experienced clients sell all their other frames.