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.
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- [SHIS ZS44/28.6 : EC49/40]
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- 6061 alloy cups, bearing cover and top cap with o-ring and rubber lip seal
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- Stainless steel bolt
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- Split Crown Race : Ø40mm CNC’d aircraft grade aluminium
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- Head tube insertion diameter, Upper: Ø44mm[SHIS ZS44/28.6 (Zero Stack Ø44mm head tube / Ø28.6mmsteerer/bearing seat)]
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- Head tube insertion diameter, Lower :Ø49mm[SHIS EC49/40 (External Cup Ø49mm head tube / Ø40mm crown race seat)]
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- Head tube insertion depth : 9.5mm (upper), 20mm (lower),
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- 45° ACB steel cartridge bearings
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- Stack Height : 25.9mm
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- Weight : 107g (excluding top cap & bolt), 133g (including top cap & bolt)
