The Internal Tapered ZS44/ZS56 will fit Snabb Carbon, Fuzz (2017 and older), and all pre-2016 NS Bikes suspension frames. This headset is light & strong due to cups made from high quality aluminum and fitted with sealed bearings. Two crown races included to fit both tapered 1.5 - 1 1/8" and standard 1 1/8" steer tubes. Crown races CNC machined of tough 7075 aluminum and come with a cut allowing super easy installation. Top cap, star nut and NS Bikes headset spacer set of 4 sizes included.