Lightweight, precision-sealed bearing alloy headset for use on 1" threaded type forks.FeaturesAluminium headset cups32mm adjusting race32mm locknut with plastic top sealSealed cartridge angular contact bearingsSize: 1" Colour: Silver anodisedSpecificationsUpper stack height: 26mmLower stack height: 11mmCrown race: 26.4mmHeadtube ID: 30.2mmCompatible withFork steerer OD: 25.4mmThreaded: 1 " x 24Tpi