headset lower - blackbearing - Semi integrated frame 55 mm pivot 1-1/2

Key FeaturesSemi integrated lower headset ZS55/40 standardCompatible with 1.5 forks with 40 mm crown raceDesigned for 55 mm head tubesIdeal for modern tapered configurationsStable and precise steering performance DescriptionThe Black Bearing BB-HE-ZS55/40 lower headset is designed for frames with a 55 mm head tube and forks with a 40 mm crown race.The semi integrated Zero Stack design provides a strong and compact solution, ensuring smooth and precise steering even under demanding conditions. SpecificationsType: lower headsetStandard: ZS55/40Frame diameter: 55 mmFork crown race diameter: 40 mmFork compatibility: 1.5Structure: semi integrated Zero StackBearing angle: 36 x 45 degreesMaterial: alloy and steelUse: MTB, enduro, e-bike, gravel CompatibilityCompatible with 55 mm head tubesCompatible with 1.5 forksCompatible with tapered forks lower partNot compatible with 1-1/8 forksNot compatible with EC or IS systems