Industry Nine iRiX ZS44/ZS56 Headset : ZS44/28.6 | ZS56/40 ZeroStack Complete Red

TECH SPECS Crown Race Diameter 40mm Headset Type ZeroStack SHIS Lower ZS56/40 Headset Position Complete Material Aluminum Steerer Tube 1-1/8-1.5 Upper Cup 44mm SHIS Upper ZS44/28.6 Bearing Grade Stainless Steel Lower Cup 56mm Primary Color Red S.H.I.S. ZS4