ACROS AZ-56 Headset Lower Part 1 1/8 Inches Press Fit ZS56/30 - OD63

Symbolic picture: Details of the pictured headset may differ slightly in appearance.

To maximize the compatibility with different fork steerers, bikes and frames, the upper and lower parts of ACROS headsets are being offered separately in a great variety of dimensions.

The semi-integrated ACROS AZ-56 Headset Lower Part features the newest seal technologies from ACROS and high-end bearings in stainless quality for 1 1/8" forks and frames with a 56 mm inner diameter headtube.
Precisely manufactured angular contact bearings made of stainless steel form the heart of the AZ-56 and offer play-free and smooth steering characteristics for a long time.

VULCANIZED SEALING

With a sturdy vulcanized seal bonded to the compression ring and the base plate as an additional and first barrier against water and dirt.

V-LIP
In addition to the new vulcanized seal on the compression ring and the base plate, the sealing discs of the bearings now have a special v-groove double split lip (V-LIP). Furthermore, the V-LIP is recessed in a fine polished groove, which significantly increases the sealing effect once again.

The name ACROS AZ-56 describes the semi integrated (also known as press fit or zero stack) Ahead headset for 1 1/8" forks and frames with a 56 mm inner diameter headtube. The S.H.I.S. denotation (see attachment) for the lower part offered here is ZS56/30 (with the 1 1/8" crown race) with 63mm outer diameter (OD).
Construction type (Ahead/Thread): Ahead
Cup skirt length in mm: 10 mm
Included in delivery: 1x lower part of the headset, 1x 1 1/8" crown race
Material: headset cup: aluminium
bearing: stainless steel
Weight supplement: manufacturer information