Tapered Threadless Headset

     Specification:
◎  ZS49/28.6∣EC49/40
◎  Alloy, Sealed Bearings 
◎  ACB Upper-36° x 45°; Lower-45° x 45°
◎  TOP NUT: 1 1/8"
◎  CUP O.D.: 49.6
◎  CROWN CONE: 39.8
◎  Height: 23.3mm