FSA Orbit ZS-4D Semi-Integrated Headset, 1-1/8" - ZS44/28.6 Up ZS44/30 Low. ACB

ACB Bearings. FSA Headset. 150g - Inc. Stack Height: 17.9mm. Includes Top Cap (TH-874), Top Cone (15mm Alloy), Star Nut & Crown Race.

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