Sealed cartridge bearing tapered headset, compatible with the Black Label v3 and Ti Track. CNC-machined aluminum construction resists fading and deformation, delivering smooth, low-friction steering with a fully integrated fit — no external cups, no bulk. [FEATURES] TYPE: Integrated, Tapered (1.5" Lower / 1.125" Upper) BEARINGS: Sealed Cartridge Bearings, Top & Bottom MATERIAL: CNC-Machined Aluminum Alloy Cups w/ Steel Bearing Races Specs: STACK HEIGHT: 16.8mm TOP CUP: Ø47mm Outer / Ø42mm Bore TOP BEARING: Ø41.8mm x Ø30.15mm x 6.5mm BOTTOM CUP: Ø57mm Outer / Ø52.1mm Bore BOTTOM BEARING: Ø52mm x Ø40mm x 7mm STEERER CLEARANCE: Ø28.6mm (1.125") WEIGHT: 75g (top) + 65g (bottom) Compatibility Notes: Compatible with the Black Label v3 and Ti Track frames. Fits a 41.8mm head tube top bore and a straight 28.6mm steerer.