Home » headsets » internal cable routing » c522a-7 INTERNAL CABLE ROUTING HEADSET C522A-7 IS52/28.6 I IS60/45.8 Alloy, Sealed Bearings 1-1/8” to 1.8” Tapered Head Tube & Steerer Top Nut: 1-1/8″ Bearing O.D.: 51.8/60 Crown Cone: 45.8 Height: 11.5 Technical Diagram