Cane Creek 44Mm OD Zs-3 Headset (Black, 1-1/8-Inch) Bearing Type: Cartridge, Crown Race: 30.0, Headset Detail Color: Black, Headset Size: 1-1/8-Inch Headset Type: Internal, 44.0 millimeter OD cup, 1-1/8-Inch(Zero Stack), Material: Al Stack Height: 10 millimeter, Steer Tube Size: 1-1/8-Inch Threadless, Weight: 74 gram