Acros ZS44/28.6 - ZS44/30 Headset

Item number: 80890
ZS44/28.6 - ZS44/30 Headset - black/ZS44/28.6 - ZS44/30
ZS44/28.6 - ZS44/30 Headset - black/ZS44/28.6 - ZS44/30
ZS44/28.6 - ZS44/30 Headset - black/ZS44/28.6 - ZS44/30
ZS44/28.6 - ZS44/30 Headset - black/ZS44/28.6 - ZS44/30
ZS44/28.6 - ZS44/30 Headset - black/ZS44/28.6 - ZS44/30
  • 100 day return period
  • Online since 1998
  • Trusted Shop 4.91 / 5.00
The ZS44/28.6 - ZS44/30 headset from Acros, with 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: For 1 1/8" head tubes combined with standard 1 1/8" forks.


Application: Road, Gravel, City & Touring, All Mountain, Cross Country, Enduro
Design: Zero Stack (ZS)
Upper Outer Diameter: 44 mm
Upper Inner Diameter: 28.6 mm
Lower Outer Diameter: 44 mm
Lower Inner Diameter: 30 mm
Head Tube: 1 1/8"
Steerer Tube: 1 1/8"

Technical Information:

Material: aluminium
Bearings: Stainless steel angular contact ball bearing, double sealed
Upper Insert Depth: 7.7 mm
Lower Insert Depth: 7.7 mm
Upper Stack Height: 8 mm
Lower Stack Height: 5.4 mm
Seals: 2 x double lip seal


- optimised headset grease
- double lip seal against moisture and dirt
- centring ring made of fibreglass-reinforced composite material with vulcanized seal
- fork cone 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 upper and lower part 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 upper and lower parts must be combined.


EC: Bearings contained within cups that are located outside of the frame (external cup).
ZS: Bearings contained within pressed-in 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:



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


  • black/ZS44/28.6 - ZS44/30, in stock

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