Acros AZ-44E ZS44/28.6 - ZS44/30 Headset

Item number: 29036

excl. shipping cost
to the delivery destination: USA

black/ZS44/28.6 - ZS44/30
2 to 7 days

Delivery to USA is not possible.

Acros AZ-44E ZS44/28.6 - ZS44/30 Headset - black/ZS44/28.6 - ZS44/30
Acros AZ-44E ZS44/28.6 - ZS44/30 Headset - black/ZS44/28.6 - ZS44/30
  • 100 day return period
  • Online since 1998
  • Trusted Shop 4.84 / 5.00
Use: for 1 1/8" upper and lower head tubes combined with standard 1 1/8" forks.


Application: Cross Country, Road, City & Touring
Upper Cup: 1 1/8"
Lower Cup: 1 1/8"
Steerer Tube: 1 1/8"
Design: zero stack (ZS)

Technical Information:

Material: aluminium 2000
Bearings: angular contact cartridge bearings (steel)
Upper Insert Depth: 9.4 mm
Lower Insert Depth: 9.4 mm
Upper Stack Height: 16.5 mm
Lower Stack Height: 5.8 mm
Upper Outer Diameter: 44 mm
Upper Inner Diameter: 28.6 mm
Lower Outer Diameter: 44 mm
Lower Inner Diameter: 30 mm
Seals: R2 rubber lip seal

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

The Standardized Headset Identification System (S.H.I.S.) creates a common language for describing modern bicycle headsets. The system provides comprehensive and scalable headset fitment information in a standardized format; making it easy to communicate headset requirements based on frame and fork interfaces. The system addresses the critical interface dimensions required to fit a fork to a frame, as well as bearing location / cup type. To determine fit, four dimensions are needed: (1) stem-clamp diameter of fork, (2) crown-race seat diameter of fork, (3) head-tube top inside diameter, and (4) head-tube bottom inside diameter. Bearing location and cup-type are identified as (a) external cup (EC), (b) semi-integrated or zero stack (ZS), or (c) integrated (IS).


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).

Use the AH-T DIY to press in your headset.

Manufacturer Part Number:



- 1 x Acros AZ-44E upper bearing cup, incl. steel bearings
- 1 x Acros AZ-44E lower bearing cup, incl. steel bearings
- 1 x headset dust cap
- 1 x Ahead cap
- 1 x star nut with M6 x 30 bolt
- 1 x compression ring
- 1 x crown race


  • black/ZS44/28.6 - ZS44/30: 96 g


in stock 2 to 7 days up to 10 days Out of stock inform me
  • black/ZS44/28.6 - ZS44/30

Customer Reviews (4)


You have questions regarding a product?

+49 2405.450045 +49 2405.450045

Customer Reviews (4)


Give us your opinion on this product.

by Sebastian D.  on 13.12.2017
verified purchase

Ist mittlerweile ein halbes Jahr verbaut, macht keine Probleme. Top

Is this review helpful?
by Patrick Z.  on 29.08.2017
verified purchase

Sehr gutes Preis-Leistungsverhältnis. Lässt sich mit dem Werkzeug wie von bc empfohlen sehr leicht montieren und verhält sich von da an unauffällig

Is this review helpful?
by Gunnar G.  on 30.11.2016
verified purchase

Top verarbeitet, sehr gute Einbauanleitung, Lager und Dichtungen sind Spitze. Das alles Made in Germany und dann auch noch zu einem moderaten Preis. Klare Empfehlung!

Is this review helpful?
by Willibald B.  on 02.10.2013
verified purchase
1 of 1 customers found this review helpful.

Habe ihn bereits an drei Fahrrädern verbaut und bin bisher sehr zufrieden, einmal richtig eingestellt passt er wie am ersten Tag - leichtgängig und ohne Spiel.

Is this review helpful?

Give us your opinion on this product.