headset lower - blackbearing - Semi integrated - frame 55 mm - pivot 1-1/8

Key FeaturesSemi integrated lower headset ZS55/30 standardCompatible with 1-1/8 forks with 30 mm crown raceAllows 1.5 to 1-1/8 conversionDesigned for 55 mm head tubesSmooth and stable steering performance DescriptionThe Black Bearing BB-HE-ZS55/30 lower headset is designed for frames with a 55 mm head tube and forks with a 30 mm crown race.The semi integrated Zero Stack design allows the use of 1-1/8 forks on larger head tubes, making it ideal for conversion and upgrade applications. SpecificationsType: lower headsetStandard: ZS55/30Frame diameter: 55 mmFork crown race diameter: 30 mmFork compatibility: 1-1/8Function: reductionStructure: semi integrated Zero StackBearing angle: 36 x 45 degreesMaterial: alloy and steelUse: MTB, enduro, gravel CompatibilityCompatible with 55 mm head tubesCompatible with 1-1/8 forksIdeal for 1.5 to 1-1/8 conversionNot compatible with direct 1.5 forksNot compatible with EC or IS systems