Product Description Acera mountain bike rear derailleur with light action operation and over-size pulleys for a wide gear choice. Oversize 13-tooth tension and guide pulleys to reduce noise and wear. Extension spring and low-friction fluorine-coated link pivot bushing result in a light shifting action. Top normal spring for use with Rapidfire shifters. IG and HG chain, 7- and 8-speed compatible. For use with 28 to 34 tooth low rear sprockets, total capacity 43 teeth. Box Contains 1 x Rear Derailleur
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