FSA: Orbit IS 138 Integrated 1.1/8 - 1.3/8" 41.2/4
FSA: Orbit IS 138 Integrated 1.1/8 - 1.3/8

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* For Tapered 45mm/52mm OD head tube * For 1.1/8" to 1.3/8" tapered fork * Carbon fibre top cover * Angular Contact Bearing (Blue seal) **Spares:** * Top bearing: 873E (160-1648) * Bottom bearing: MR031 (160-6753)