White Industries ZS44/ZS56 Headset 1-1/2 Crown Race Compatible (Colour Options)

White Industries
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IMPORTANT Note: If an item is in stock at www.whiteind.com we can usually have it here within TWO weeks. Even if it's not in stock White Industries can often assemble it for us, and we can have it within THREE weeks est. Get in touch if you're after something specific - The team at DAY | ZERO

The ZS44│ZS56 headset is designed to fit frames with tapered 44mm/56mm head tubes and works with tapered 1-1/2” fork steerers. The “ZS” stands for “Zero Stack” as the section of the cup that houses the bearing sits inside of the frame’s head tube. The “44/56” stands for the top/bottom diameter of the “skirt” that presses into the frame.

Note: As of 9/14/23, headsets will no longer include Star Nuts due to the Earth’s star nut overpopulation crisis. If you need one, they are available separately.

Features

    • U.S. sourced 6061-T6 aluminum
    • Machine engraved White Industries logos 
    • Easily replaceable 440C Stainless Steel Enduro bearings which feature a limited lifetime warranty
    • “Split” crown race for tool-free installation and removal
    • Really sweet matching headset spacers available separately
    • Can accommodate “tapered 1-1/2” forks with a 40mm crown race seat

Specs 

    • SHIS specification

        • Upper: ZS44/28.6

        • Lower: ZS56/40
    • Stack height

        • Upper: 8mm

        • Lower: 4mm
    • SHIS definitions on the Park Tools website: here
    • Frame/Fork specs:

Frame upper head tube inside diameter


43.95mm to 44mm


Frame lower head tube inside diameter


55.9mm to 55.95mm


Fork steerer diameter top section 


28.45mm to 28.6mm


Crown race seat diameter for


 “straight 1-â…›”


30.015mm to 30.075mm


Crown race seat diameter for


 “tapered 1-¼”


33.03mm to 30.09mm


Crown race seat diameter for


 “tapered 1-½”


39.79mm to 39.85mm

 

Bearings

 


Headset Model

Upper Bearing (inner/outer angle) Lower Bearing

(inner/outer angle)


Lower Fork Race Compatibility


ZS44│ZS56

ACB3645SS 36/45 ACB6808CCSS 36/45 1-â…›” (30mm)

 1-¼” (33mm)


 1-½” (40mm)