White Industries ZS44/28.6 - ZS56/40 Headset

The Californians at White Industries always strive for the highest quality when it comes to their own products and the tax rates are no exception. They are designed to be easy to maintain, clean and adjust, and together with aluminium bearing cups and stainless steel ball bearings, this makes for a worry-free, long-lasting headset you can rely on no matter where your bike takes you.

Use:
Designed for 1 1/8" upper head tube diameters and 1.5" lower head tube diameters combined with 1 1/8" - 1.5" tapered forks.

Specifications:

Application:

Road, Gravel, Cyclocross, Cross Country, Trail, All Mountain, Enduro

Top Cup:

1 1/8"

Bottom Cup:

1.5"

Steerer Tube:

1 1/8" - 1.5" tapered

Design:

Zero Stack (ZS)

Technical Information:

Material:

aluminium 6061-T6 (CNC - Made in USA)

Bearings:

stainless steel precision

Top Stack Height:

8 mm

Bottom Stack Height:

4 mm

Top Outer Diameter:

44 mm

Top Inner Diameter:

28.6 mm

Bottom Outer Diameter:

56 mm

Bottom Inner Diameter:

40 mm

Standardized Headset Identification System (S.H.I.S.):

In order to clarify and bring uniformity to a sea of headset standards, manufacturers Acros, Cane Creek, Hope, Race Face, Reset Racing and Ritchey have agreed upon using a shared nomenclature, which will likely include more participating companies in the future. This system takes into account a combination of frame and fork dimensions. Both the top and bottom parts of the headset are marked by two alphanumeric identifiers. The first identifier indicates the type of headset (External Cup, Zero Stack, Integrated) and head tube diameter. The second identifier - separated from the first by a backslash - indicates the diameter of the steerer tube. When referring to a complete headset, the specifications of both top and bottom parts must be combined.

Nomenclature:

EC:

Bearings contained within headset cups that are located outside of the frame (External Cup)

ZS:

Bearings contained within pressed-in headset cups where the cup and bearings rest inside the frame (Zero Stack)

IS:

Bearings that fit directly into a bonded or machined interface that is integrated into the frame (Integrated)

Manufacturer Numbers:

black:

HSZ4428Z5640BK

silver:

HSZ4428Z5640

Contents:

• 1 x White Industries upper headset cup incl. stainless steel bearings
• 1 x White Industries lower headset cup incl. stainless steel bearings
• 1 x top cap
• 1 x Ahead cap
• 1 x star nut incl. aluminium bolt
• 1 x compression ring
• 1 x crown race