Home » headsets » Tapered Headsets » d44f TAPERED HEADSETS D44F IS42/28.6 | IS47/33 Alloy Sealed Bearings 1-1/8″ to 1-1/4″ Tapered Steerer Top Nut: 1-1/8″ Bearing O.D.: 41.8/46.8 Crown Cone: 33 Height: 16.6 Technical Diagram