Fulcrum racing quattro carbon h40 road wheels the racing quattro name is derived from the italian word for four or quattro representing the very versatile 40mm rim profile the common denominator throughout the line up of racing quattro wheels comes in the form of this do it all rim profile that offers both aerodynamic advantages and a low rotational mass with such a combination the 40mm rim is equally at home on both climbs as well as leading the pack on the flats it is the one perfect