Acros ZS44/28.6 - ZS44/30 Headset

The ZS44/28.6 - ZS44/30 headset from Acros, with a semi-integrated design for 1 1/8" head tubes and straight standard steerer tubes, is an all-round carefree product. It impresses with double sealed angular contact ball bearings made of stainless steel, optimized headset grease and additional seals.

Use:

Designed for 1 1/8" head tubes combined with standard 1 1/8" forks.

Specifications:

Application:

Road, Gravel, City & Touring, All Mountain, Cross Country, Enduro

Design:

Zero Stack (ZS)

Top Outer Diameter:

44 mm

Top Inner Diameter:

28.6 mm

Bottom Outer Diameter:

44 mm

Bottom Inner Diameter:

30 mm

Head Tube:

1 1/8"

Steerer Tube:

1 1/8"

Technical Information:

Material:

aluminium

Bearings:

Stainless steel angular contact ball bearings, double sealed

Upper Insert Depth:

7.7 mm

Lower Insert Depth:

7.7 mm

Top Stack Height:

8 mm

Bottom Stack Height:

5.4 mm

Seals:

dual double lip seal

Features:

• optimised headset grease
• dual double lip seal offers protection from moisture and dirt
• compression ring made of fibreglass-reinforced composite material with vulcanized seal
• crown race with vulcanized seal
• long durability with minimal maintenance

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 Number:

32.02.000R1H

Contents:

Acros Headset ZS44/28.6 - ZS44/30, consisting of:

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