• Robust attachment body improves durability and shifting response
• Replaceable pulleys and adjustment hardware
• Cage Length: Long
• Steel cage with steel/composite outer link
• Largest Cog: 32t
• Chain Wrap Capacity: 43t
• Rear Derailleur Mount Type: Standard or Dropout Claw Hanger
• Drivetrain Speeds: 6, 7 Speed
• Published Weight: 206g (Standard), 316g (Dropout Claw Hanger)

microSHIFT's line of mountain and trekking derailleurs starts with M21, but that doesn’t mean it’s entry level. Using the same kinematics as their more expensive derailleurs and innovative construction technics, M21 delivers responsive performance in an attainable package.