Industry Nine iRiX EC 34 Upper Headset Jenson USA Industry Nine iRiX Integrated (IS) Headset 41mm 52mm Thunder Industry Nine iRiX Headset EC34 Upper AVT AVT.Bike INDUSTRY NINE Headset iRiX Tapered ZS44 28.6 ZS56 40 1 1 8" 1 1 2. Elevate your cycling experience with the Industry Nine iRiX Lower EC44 40 headset. Designed for performance and versatility, this premium headset offers a seamless integration into your bike's cockpit. Customize and upgrade your cockpit with iRiX options for a tailored fit. Separate upper and lower headset cup assemblies allow for mix and match configurations. Upper assemblies come complete with a star nut and top cover, while lower assemblies include a split crown race. Crown race and top cover feature removable and replaceable silicone lip seals, ensuring your 440c stainless steel bearings remain contaminant free. Lightweight design at just 53g, enhancing your bike's overall performance. How to use Ideal for: The Industry Nine iRiX Lower EC44 40 headset is perfect for cyclists looking to enhance their bike's handling and comfort. Simply install it in conjunction with compatible upper assemblies to achieve a customized setup that meets your riding style. Details: Model IRiX Lower S. H. I. S. EC44 40 Upper Lower Lower Stack 12mm Color Red Weight 53g