microSHIFT M21 Rear Derailleur - 67 Speed Short Cage Black Size-453g }SRAM 46 Tooth 107mm BCD

}SRAM 46 Tooth 107mm BCD x 4-Bolt 1x12-Speed X-Sync Chainring Blast Black

8 Bar Drop (mm) 127 Bar Reach (mm) 76 Bar Top Style Flat Cable Routing Internal Color Black Defined Color Black Drop Bend Style Anatomic Drop Bend Style Compact Material Carbon Width 38

This replacement plastic strap slot insert allows for use of Salsa EXP Series Tube Strap on Blackthorn and Cassidy Carbon frames

Air can diameter on Gen 2 is also reduced by 6mm from 57mm to 51mm

microSHIFT M21 Rear Derailleur - 67 Speed Short Cage Black Size-453g }SRAM 46 Tooth 107mm BCDmicroSHIFT M21 Rear Derailleur 67 Speed Short Cage Black. 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 TECH SPECS Cage Length Short Chain Wrap Capacity (teeth) 39 Color Black Drivetrain Speeds 6 Drivetrain Speeds 7