Article number 33435337001 EAN 796941332026 Brands Ritchey Headset size 1 1/8 - 1 1/2 Inch Integration method Press fit (Semi integrated) Headset part Set Inner diameter head tube bottom (mm) 55 Inner diameter head tube top (mm) 44 Outer diameter head tube bottom (mm) 61 Outer diameter head tube top (mm) 50 Fork tube diameter bottom (mm) 38.1 Fork tube diameter top (mm) 28.6 Type LOGIC Material Steel Product Description Use:Designed for 1 1/8" upper and 1.5" lower head tubes combined with tapered forks.Specifications:Application:Road, Cross CountryTop Cup:1 1/8"Bottom Cup:1.5"Steerer Tube:1 1/8" - 1.5" taperedDesign:Zero Stack (ZS)Technical Information:Material:steelBearings:semi-cartridge bearings (loose balls)Top Outer Diameter:44 mmTop Inner Diameter:28.6 mmBottom Outer Diameter:55 mmBottom Inner Diameter:40 mmTop Cap:4.2 mmFeatures:Series: CompBearing Angle: 45°Standardized 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:33-247-420 Contents:1 x Ritchey Comp press-fit upper cup incl. bearing1 x Ritchey Comp press-fit lower cup incl. bearing1 x top cap1 x Ahead cap with bolt and star nut1 x compression ring1 x crown race Weight: black | 1 1/8" - 1,5" tapered | ZS44/28,6 - ZS55/40: 155 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