Lightweight complete integrated headset with customs size lower bearing used on Aethos model bikes.

• Upper Bearing: 41.8mm OD x 30.5mm ID x 8mm Thick (45x45 degree)
• Lower Bearing: 49.5mm OD x 40.5mm ID x 6.5mm Thick (45x45 degree)
• 45mm OD / 9.5mm tall carbon top transition cover.
• Split plastic compression ring, 7mm tall.
• 10mm carbon headset spacer (3 pcs.)
• 5mm carbon headset spacer (2 pcs.)

Where Used

2025 S-Works Aethos Frameset - FACT 12r Carbon
2025 S-Works Aethos - Shimano Dura-Ace Di2
2025 S-Works Aethos - SRAM RED AXS
2025 Aethos Sport - Shimano 105
2025 Aethos Pro - Shimano Ultegra Di2
2025 Aethos Pro - SRAM Force eTAP AXS
2025 Aethos Frameset - FACT 10r Carbon
2025 Aethos Expert - SRAM Rival eTAP AXS
2025 Aethos Comp - Shimano 105 Di2
2024 S-Works Aethos Ready to Paint Frameset
2024 S-Works Aethos LTD - SRAM RED AXS
2024 S-Works Aethos Frameset - FACT 12r Carbon
2024 S-Works Aethos - Warranty Frame
2024 S-Works Aethos - Shimano Dura-Ace Di2
2024 S-Works Aethos - Red eTap AXS
2024 S-Works Aethos - Dura-Ace Di2
2024 Aethos Sport - Shimano 105
2024 Aethos Sport - Shimano 105
2024 Aethos Pro - Warranty Frame
2024 Aethos Pro - Shimano Ultegra Di2
2024 Aethos Pro - Force eTap AXS
2024 Aethos Frameset
2024 Aethos Expert - SRAM Rival eTAP AXS
2024 Aethos Expert - Rival eTap AXS
2024 Aethos Comp - Shimano 105 Di2
2024 Aethos Comp - Shimano 105 Di2
2023 S-Works Aethos LTD - Campagnolo Super Record
2023 S-Works Aethos Frameset - Ready to Paint
2023 S-Works Aethos Frameset - FACT 12r Carbon
2023 S-Works Aethos - Shimano Dura-Ace Di2
2023 S-Works Aethos - SRAM RED eTAP AXS
2023 S-Works Aethos - Dura-Ace Di2
2023 Aethos Pro - Shimano Ultegra Di2
2023 Aethos Pro - Shimano Ultegra Di2
2023 Aethos Frameset - FACT 10r Carbon
2023 Aethos Expert - SRAM Rival eTAP AXS
2023 Aethos Expert
2023 Aethos Comp - Shimano 105 Di2
2023 Aethos Comp - Shimano 105 Di2
2022 S-Works Aethos Frameset - Sagan Collection: Disruption
2022 S-Works Aethos Frameset - Ready to Paint
2022 S-Works Aethos Frameset - FACT 12r Carbon
2022 S-Works Aethos - Shimano Dura-Ace Di2
2022 S-Works Aethos - SRAM Red eTap AXS
2022 Aethos Pro - SRAM Force eTap AXS
2022 Aethos Frameset - Sagan Collection: Disruption
2022 Aethos Frameset
2022 Aethos Expert - Shimano Ultegra Di2
2022 Aethos Comp - SRAM Rival eTAP AXS
2021 S-Works Aethos Frameset
2021 S-Works Aethos - SRAM Red eTap AXS
2021 S-Works Aethos - Founder's Edition
2021 S-Works Aethos - Dura Ace Di2
2021 Aethos Pro - Shimano Ultegra Di2
2021 Aethos Pro - SRAM Force eTap AXS
2021 Aethos Frameset
2021 Aethos Expert - Shimano Ultegra Di2