Product Description Simply high-quality: the EC34/28.6 - EC34/30 Standard Headset by Hope The Hope EC34/28.6 - EC34/30 headset is characterised by its reliability and durability. The reason for this is the corrosion-resistant stainless steel bearings and the multi-seal. In addition, the bearing cups are made of high-quality aluminium. The compression ring and crown race are slotted to facilitate assembly. Use:For 1 1/8" upper and lower head tubes combined with standard 1 1/8" forks.Specifications:Application:Downhill, All Mountain, Enduro, Cross Country, TrailTop Cup:1 1/8"Bottom Cup:1 1/8"Steerer Tube:1 1/8"Design:external cup (EC)Technical Information:Material:aluminium (2014-T6)Bearings:cartridge, stainless steelUpper Insert Depth:10 mmLower Insert Depth:10 mmTop Outer Diameter:34.1 mmTop Inner Diameter:28.6 mmBottom Outer Diameter:34.1 mmBottom Inner Diameter:30 mmSeals:Cap and integrated rubber sealFeatures:corrosion-resistant stainless steel bearings, replaceableslotted compression ring / crown race for easier assemblymulti-sealStandardized 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 Numbers:red:HSXRblue:HSXBorange:HSXCpurple:HSXPUblack:HSXNsilver:HSXSContents:1 x Hope upper headset cup incl. stainless steel bearings1 x Hope lower headset cup incl. stainless steel bearings1 x Hope top cap1 x compression ring1 x crown race2 x O-ring3 x spacers1 x Hope Head Doctor headset expander Weight: black | 1 1/8" | EC34/28,6 - EC34/30: 120 g Manufacturer: Hope Mill Calf Hall Road Barnoldswick Lancashire BB18 5PX United Kingdom info@hopetech.com Distributor: bc GmbH Carlo-Schmid-Straße 12 52146 Würselen Germany info@bike-components.de