Hardly any other component is more hidden but nevertheless important than the Headset. More than 15 years of know-how in bearing technology are directly reflected in our products. The result are Highend-Headsets with the right spark of glamour and elegance. External Cup offers, because of its type of construction the biggest creative scope.Features:Stainless - Industry - Angular contact ball bearings, double sealed,CNC - made in Germany / Al2000 series,R3 seal (metal sheet supported rubber seal).Technical Specifications:Fork steerer: 30mm/ 1 1/8",Cup skirt Ø: 34mm,Cup skirt length: 9,6mm,Total stack high: 14mm,Weight: 53g.