Designed for bikes with semi-integrated headsets, the WCS Semi-Integrated ZS Headset features fully complementary stainless steel angular contact cartridge bearings packed with Ritchey high-webbing grease and corrosion-resistant Ti-coated bearings.

Article number 33055337010 EAN 796941332552 Brands Ritchey Outside diameter lower bearing (mm) 41 Integration method Press fit (Semi integrated) Headset section Bottom Inner diameter head tube bottom (mm) 44 Outside diameter head tube bottom (mm) 50 Fork tube diameter bottom (mm) 30 Headset size 1 1/8 Inch Inner diameter lower bearing (mm) 30.15 Product Description Use:for 1 1/8" lower head tubes combined with standard 1 1/8" forks.Specifications:Application:Road, Cross CountryBottom Cup:1 1/8"Steerer Tube:1 1/8"Design:Zero Stack (ZS)Technical Information:Material:aluminiumBearings:cartridge bearings (titanium-coated)Bottom Outer Diameter:44 mmBottom Inner Diameter:30 mmFeatures:series: WCS (World Championship Series)Sealed bearingsStandardized 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 top and bottom parts 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 top and bottom parts must be combined. Nomenclature:EC:Bearings contained within headset cups that are located outside of the frame (External Cup)ZS:Bearings contained within pressed-in headset 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:33055337010 Contents:1 x Ritchey WCS press-fit lower headset cup incl. bearing1 x crown race Weight: black | 1 1/8" | ZS44/30: 34 g Manufacturer: Ritchey Design Inc. 575 Old County Road San Carlos CA 94070 USA info@ritcheylogic.com Distributor: Cosmic Sports GmbH Leyher Straße 47 90763 Fürth Germany info@cosmicsports.de