Industry Nine iRiX Upper ZS44/28.6 Blue 5mm Cover Weight-50g The hardest steel on the

The hardest steel on the Mohs scale is 7

BCS logo with Colorado flag "C" in the design

RoadLink - allows for wide range cassettes to be used with Shimano road rear derailleurs

The EnCase System: Bar Kit One includes a Hex Bit Wrench Multi-Tool

Custom-molded upper lip seal provides additional protection for upper bearing

Industry Nine iRiX Upper ZS44/28.6 Blue 5mm Cover Weight-50g The hardest steel on theCustomize and upgrade your cockpit with iRiX options Separate upper and lower headset cup assemblies to mix and match Upper assemblies include star nut and top cover, while lower assemblies include split crown race Crown race and top cover employ removable and replaceable silicone lip seals to keep the sealed, 440c stainless steel bearings contaminant free TECH SPECS model iRiX upper S. H. I. S. ZS44 28. 6 upper lower upper stack 6mm color blue weight