1.1/8" upper and 1.5" lower zero stack headset
Cartridge Bearings
Upper: #1508 (YHD04000)
Lower / #1718 (YHD03400)
Cup frame pressure inlet diameter:
Top: φ1.7 inches (44 mm), bottom: φ2.2 inches (56 mm)
Crown cone: #500895BK (YHD03100)
Aluminum alloy anchor set included
Stack Height: 0.7 inches (17.4 mm).
117g