<p>Differential Headtube 45&Acirc;&deg;/ 45&Acirc;&deg; ACB Upper Industrial bearing - 36&Acirc;&deg;/45&Acirc;&deg; Lower(Compatible with carbon or Alloy headtubes)<br />For tapered 46mm/56mm OD headtube<br />For tapered fork steerer 1.5" to 1-1/8"<br />Carbon fiber top cover<br />Upper : Campy Angular Contact Bearing (Black seal) - Lower: Industrial cartridge sealed bearing<br />Stack Height 0.8mm + 15.5 mm = 16.3mm<br />Peso seg&uacute;n fabricante: 81.2 grs<br />Ref. fabricante FSA: 121-0462</p>