Sealed Bearing Headset 44/44-50.6/44-55/44-56mm 1-1/8″ for 30/33/39.8mm Fork
44-44/44-50.6mm (Crown race: 30mm) headset fit 28.6mm straight tube fork. 44-50.6mm (Crown race: 39.8mm) headset fit 28.6mm tapered tube fork. 44-55/44-56mm headset fit 28.6mm straight/tapered tube fork.