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-49 Headset Lower Part features the established high-end bearing and seal technologies from ACROS in stainless quality.
Precisely manufactured angular contact bearings made of stainless steel form the heart of the AZ-49 and offer play-free and smooth steering characteristics for a long time.
The right sealing technology is equally important as the highest quality bearings when it comes to high-end components. For the AZ-49 ACROS uses the R3 seals featuring a specially shaped sealing lip with steel-plate reinforcement to achieve the best possible properties. The slide-on seal is firmly seated, defining and guaranteeing optimized function with low friction.
The name ACROS AZ-49 describes the semi integrated (also known as press fit or zero stack) 1 1/8" Ahead headset for frames with a 49 mm inner diameter headtube. The S.H.I.S. denotation (see attachment) for the lower part offered here is ZS49/30.
Symbolic picture: Details of the pictured headset may differ slightly in appearance.
Construction type (Ahead/Thread): Ahead
Cup skirt length in mm: 15 mm
Material: headset cup: aluminium
bearing: stainless steel
Weight supplement: manufacturer information