Fulcrum racing quattro carbon h40 disc wheels the foundation of the racing quattro name is derived from the italian word for four or quattro which describes the very versatile rim profile of 40mm this do it all rim profile offers an aerodynamic advantage as well as a low rotational mass and is equally at home on climbs and on the flat the racing quattro carbon incorporates an extremely advanced carbon fibre rim with technology deriving from wheels that come at a much higher price point t