Replaces Cane Creek XX-44 headsetFor use with 1.5" threadless steerer tube bottom (40mm crown race seat diameter, tapered steerer tube)Converts 44mm head-tube bottom for use with 1.5" 40mm crown race forksExternal Cup (EC) 44mm Bottom Assembly enables use of tapered steerer tubeExternal Cup (EC) assemblies feature press-in cups with bearings outside the frameCombine with 44mm 1-1/8" ZeroStack Top Assembly for complete 44mm straight head-tube installationReplaces Cane Creek XX-44 headsetBottom assemblies include bottom cup, sealed oxide bearing, and crown raceEC44/40 Conversion Bottom fits 1-1/8" 44mm standard head tube bottom (44mm inner diameter)Consistent stack heights across 10, 40 and 110 SeriesConverts 44mm head-tube bottom for use with 1.5" 40mm crown race forksDurable steel crown race with low-friction face-sealsExternal Cup (EC) 44mm Bottom Assembly enables use of tapered steerer tubeExternal Cup (EC) assemblies feature press-in cups with bearings outside the frameCombine with 44mm 1-1/8" ZeroStack Top Assembly for complete 44mm straight head-tube installationInternally relieved AL-6061 T-6 cupAssembly includes 1.5" black oxide steel bearing and 40-Series 1.5" crown raceItem SpecificationsColorBlackWeight65gMaterialAluminumSteerer Tube1.5"Crown Race39.7Stack Height12mmBearing TypeBlack Oxide SealedHeadset TypeInternal, 56.0mm OD cup, (1.5" Zero Stack)S.H.I.S LowerEC44,40