KCNC F10 Taper Headset (ZS44 : EC49)

Taper headset designed for head tubes with a 44mm upper and 49mm lower, and a 1 1/8"- 1.5" taper steerer.  The lower external cup has a 20mm insertion depth for high load MTB bikes with longer forks. The upper cup is a semi-integrated zero stack cup.

•  [SHIS ZS44/28.6 : EC49/40]
• 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 : Ø49mm [SHIS EC49/40    (External Cup Ø49mm head tube / Ø40mm crown race seat)]
• Head tube insertion depth : 9.5mm (upper), 20mm (lower),
• 45° ACB steel cartridge bearings
• Stack Height : 25.9mm
• Weight : 107g (excluding top cap & bolt), 133g (including top cap & bolt)