microSHIFT M21 Rear Derailleur - 6,7 Speed, Short Cage, Black
$15.99
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M21 rear derailleurs are designed to work with 6- and 7-speed Shimano road and mountain shifters. Enjoy the wide variety of bikes you can get going again with M21 rear derailleurs. Robust composite and steel construction Compatible with Shimano 6- and 7-speed mountain and road systems
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