ACS MainDrive Integrated Headset

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MainDrive Integrated Headsets feature CNC machined alloy tops with 45/45 degree sealed mechanism retainer bearings. Crown Race: 30 S.H.I.S. Stem Clamp Diameter: 28.6 Threadless Bea ring Type: Cartridge S.H.I.S Lower: IS42 S.H.I.S Upper: IS42 Show more