microSHIFT ADVENT X Rear Derailleur – 10-Speed Medium Cage Black With Clutch. With a raceworthy weight and the right gearing for any situation microSHIFTs top-of-the-line ADVENT X rear derailleur delivers high-end performance without high-end headaches. By using a 10-speed chain and wide range 11-48t cassette with predictable evenly spaced gear steps ADVENT X allows you to find the right gear even in challenging conditions. Add in microSHIFTs proprietary ratchet-and-pawl clutch larger pulleys with taller teeth for better chain retention and metric adjustment hardware and youve got everything you want and nothing you dont.

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