KCNC F11 Taper Headset (ZS44 : ZS55)

Replacement semi integrated headset for head tubes designed for tapered steerers.

•  [SHIS ZS44/28.6 : ZS55/40]
• 6061 alloy cups, bearing cover and top cap with o-ring and rubber lip seal
• Stainless steel bolt
• Split Crown Race : Ø40mm CNC'd aircraft grade aluminium
• Head tube insertion diameter, Upper : Ø44mm [SHIS ZS44/28.6 (Zero Stack  Ø44mm head tube / Ø28.6mm steerer/bearing seat)]
• Head tube insertion diameter, Lower : Ø55mm [SHIS ZS55/40    (Zero Stack  Ø55mm head tube / Ø40mm crown race seat)]
• Head tube insertion depth : 9.5mm (upper), 15mm (lower),
• 45° ACB steel cartridge bearings
• Stack Height : 9.6 + 2.8mm
• Weight : 107g (excluding top cap & bolt), 133g (including top cap & bolt)