Specialized Future Shock Headset Compression Split Ring Factory OEM | Upper Bearing Compression Ring | S172500018 The Specialized Factory Replacement Compression Split Ring is a genuine OEM headset component designed for compatible Specialized Future Shock headset systems. This split compression ring interfaces with the upper headset bearing, providing the correct factory fit within compatible Future Shock-equipped headset assemblies. It is an ideal replacement for a worn, damaged, lost, or missing original compression ring during headset or Future Shock service. For correct installation, the slot in the compression ring must be oriented toward the rear of the bicycle. Available from Stage 21 Bikes, your trusted source for hard-to-find Specialized OEM replacement parts. Key Features Genuine Specialized factory OEM replacement part Designed for compatible Future Shock headset systems Split compression ring for the upper headset bearing Direct replacement for the original factory component Used across numerous Specialized road, gravel, fitness, and Turbo platforms Specialized MPN S172500018 Specifications Specification Details Brand Specialized Component Headset Compression Split Ring Application Future Shock Headset Position Upper Headset Bearing Type Split Compression Ring Quantity 1 MPN S172500018 Installation Note Important: When installing the compression ring, orient the split/slot toward the rear of the bicycle. Correct orientation helps maintain the factory headset configuration. Follow the appropriate Specialized service procedure when servicing the headset or Future Shock assembly. OEM Compatibility 2026 Vado SL 2 LTD S-Racing Turbo Creo 2 Expert – Shimano GRX Di2 Turbo Creo 2 Comp E5 – SRAM Apex Eagle Sirrus X 6.0 Sirrus X 5.0 Sirrus X 4.0 EQ Sirrus X 4.0 S-Works Turbo Creo 2 – SRAM RED / XX1 Eagle AXS Diverge 4 Sport Alloy – Shimano CUES Diverge 4 Comp Alloy – SRAM Apex 2025 Turbo Vado SL 2 Carbon LTD – Forward 50 Collection Turbo Vado SL 2 6.0 EQ Carbon Turbo Vado SL 2 6.0 Carbon Turbo Creo 2 Expert – SRAM Rival / GX Eagle AXS Turbo Creo 2 Comp E5 – SRAM Apex Eagle Turbo Creo 2 Comp – SRAM Apex / X1 Eagle AXS Sirrus X 6.0 Sirrus X 5.0 Sirrus X 4.0 EQ Sirrus X 4.0 S-Works Turbo Creo 2 – SRAM RED / XX1 Eagle AXS Diverge Sport Carbon – Shimano GRX Diverge STR Comp – Shimano GRX Diverge Expert Carbon – SRAM Rival eTap AXS / GX Eagle AXS Diverge Comp E5 – SRAM Apex Diverge Comp Carbon – SRAM Apex eTap AXS 2024 Turbo Creo 2 Expert – SRAM Rival / GX Eagle AXS Turbo Creo 2 Comp E5 – SRAM Apex Eagle Turbo Creo 2 Comp – SRAM Apex / X1 Eagle AXS Sirrus X 4.0 EQ Sirrus X 4.0 S-Works Turbo Creo 2 – SRAM RED / XX1 Eagle AXS S-Works Diverge STR variants and framesets Diverge STR Pro / Expert / Comp Diverge Sport Carbon – Shimano GRX Diverge Pro Carbon – Warranty Frame Diverge Expert Carbon – SRAM Rival eTap AXS / GX Eagle AXS Diverge Comp E5 – SRAM Apex Diverge Comp Carbon – SRAM Apex eTap AXS 2023 Vado SL 5.0 variants, including Step-Through, EQ and UL Turbo Creo SL Comp E5 Sirrus X 5.0 Sirrus X 4.0 EQ Sirrus X 4.0 Sirrus 6.0 Sirrus 4.0 S-Works Roubaix – Shimano Dura-Ace Di2 S-Works Diverge STR models and framesets Roubaix Sport / Expert / Comp Diverge STR Pro / Expert Diverge Sport Carbon – SRAM Apex Diverge Frameset – FACT 9r Carbon Diverge Expert E5 EVO Diverge Expert Carbon Diverge Elite E5 – Shimano GRX Diverge E5 EVO Frameset Diverge E5 – Shimano Claris Diverge Comp E5 – SRAM Apex Diverge Comp Carbon – Shimano GRX 2022 Used on select: Turbo Vado SL 5.0 / Step-Through / EQ Turbo Creo SL Expert EVO / Expert / Comp E5 / Comp Carbon EVO Sirrus X 5.0 / 4.0 EQ / 4.0 Sirrus 6.0 / 4.0 S-Works Turbo Creo SL S-Works Roubaix S-Works Diverge Roubaix Sport / Pro / Expert / Comp / base models Diverge Sport Carbon Diverge Pro Carbon Diverge Expert Carbon Diverge Comp E5 Diverge Comp Carbon 2021 Used on select: Turbo Vado SL 5.0 / 5.0 EQ Turbo Creo SL Expert EVO / Expert / Comp E5 / Comp Carbon EVO Sirrus X 5.0 / 4.0 Sirrus 6.0 S-Works Turbo Creo SL S-Works Roubaix S-Works Diverge Roubaix Pro / Expert / Comp / base models Diverge Sport Carbon Diverge Pro Carbon – Campagnolo LTD Diverge Expert Carbon / E5 EVO Diverge Comp Carbon / E5 EVO Diverge Base E5 / Base Carbon 2020 Used on select: Turbo Creo SL models Sirrus X 5.0 / 4.0 S-Works Turbo Creo SL, including Founder's Edition S-Works Roubaix models and framesets S-Works Diverge Roubaix Pro / Expert / Comp variants Diverge Sport / Pro / Expert / Comp variants 2018–2019 Factory applications include numerous compatible: Sirrus Sirrus X Diverge Roubaix Ruby S-Works models and framesets Specific compatibility varies by model, trim, frame generation, and Future Shock configuration. Compatibility Notes Designed for compatible Specialized Future Shock headset assemblies. Installs at the upper headset bearing. This listing includes one compression split ring only. Future Shock systems and headset configurations vary between models and generations. Do not assume compatibility based solely on the bicycle being equipped with Future Shock. Verify Specialized MPN S172500018 against the original component or appropriate service documentation before ordering. Why Choose Genuine Specialized Headset Parts? Small headset components such as compression rings are dimensionally specific and play an important role in maintaining the correct interface between headset components. Genuine Specialized S172500018 provides the factory-specified compression split ring for compatible Future Shock headset systems, making it the appropriate OEM replacement when servicing or restoring the original assembly. Stage 21 Bikes carries genuine Specialized factory replacement parts to help keep current and previous-generation Specialized bikes properly maintained.
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