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Factory Replacement Integrated Headset – Specialized Aethos This lightweight, complete integrated headset is a direct factory replacement designed specifically for Specialized Aethos and S-Works Aethos frames. It features a custom-size lower bearing to ensure proper fit, smooth steering, and long-lasting performance. Included Components Upper bearing: 41.8mm OD × 30.5mm ID × 8mm thick (45° × 45°) Lower bearing: 49.5mm OD × 40.5mm ID × 6.5mm thick (45° × 45°) Carbon top transition cover: 45mm OD × 9.5mm tall Split plastic compression ring: 7mm tall Carbon headset spacers: 10mm spacers (3 pieces) 5mm spacers (2 pieces) Compatibility (OEM Fit) 2021–2025 Specialized Aethos 2021–2025 S-Works Aethos Compatible with both complete bikes and framesets Designed to restore factory-fit performance with lightweight materials and precise tolerances—ideal for maintenance or replacement on Aethos platforms.
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🇺🇸 Ship from USA · On Agora since 2026
$89.00