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-55 Headset Lower Part features the newest seal technologies from ACROS and high-end bearings in stainless quality for 1 1/8" forks in frames with a 55mm inner diameter headtube.
Precisely manufactured angular contact bearings made of stainless steel form the heart of the AZ-55 and offer play-free and smooth steering characteristics for a long time.
VULCANIZED SEALING
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-55 describes the semi integrated (also known as press fit or zero stack) Ahead headset for 1 1/8" forks and frames with a 55mm inner diameter headtube. The S.H.I.S. denotation (see attachment) for the lower part offered here is ZS55/30 (with the 1.5" crown race).
Construction type (Ahead/Thread): Ahead
Cup skirt length in mm: 9
Included in delivery: 1x lower part of the headset
Material: Aluminium ||| Stainless Steel
Weight supplement: manufacturer information
