microSHIFT ADVENT Super Short Rear Derailleur – 9 Speed Super Short Cage Black With Clutch. The Super Short version of our acclaimed microSHIFT ADVENT derailleur has all the same features as its larger counterpart but with a small enough cage to fit on a 20″ wheeled bike. The ratchet-and-pawl clutch and return spring tension have been finely tuned to offset the smaller cage and lighter chain allowing the derailleur to deliver fast accurate shifts with a light feel. The fully metal body resists damage and provides extra rigidity delivering big performance in a small package.

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