The mavic cosmic carbone 40 rear wheel is race proven being light stiff and aerodynamic weighing in at 635g the wheelset is pretty light and features a 3k full carbon rim yksion pro tubulars and is the pro39s choice for the spring classics rim profile they are the perfect choice if wanting an aerodynamic wheelset for road racing at a high level where performance is key wheel technology this cosmic carbone 40 wheelset offers exceptional aerodynamics great versatility and performance wh