1 Inch Threaded REF#: 173311 Bmx Threaded Steel Headset 21.1x32.5x27mm Gold. Neco Steerer OD: 1 Inch (25.4mm)Cup: 32.5mmSize: 1 Inch (21.1mm)Race: 27Material: SteelStyle: BmxColor: GoldType: ThreadedBrand: Neco Sign In to view pricing and availability