Replacement Specialized Future Shock 2.0 Cartridge Stem Shim for Diverge, Roubaix, Creo SL bikes. Includes Future Shock Knob Adjuster. Compatible with the following bikes: Diverge STR 2021 Diverge Comp Carbon 2021 Diverge Expert Carbon 2021 Diverge PRO Carbon eTAP 2021 Diverge S-Works Carbon eTAP 2021 Diverge S-Works Frameset 2020 Creo SL Expert Carbon 2020 Creo SL Expert Carbon EVO 2020 Creo SL S-Works Carbon 2020 Creo SL S-Works Carbon Founders Edition 2020 Roubaix Expert UDi2 2020 Roubaix PRO eTAP 2020 Roubaix S-Works Di2 2020 Roubaix S-Works Di2 Sagan Collection 2020 Roubaix S-Works eTAP 2020 Roubaix S-Works Frameset 2020 Roubaix S-Works Frameset Sagan Collection Also compatible with newer bikes (information not listed)