Shimano RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur

• Shadow Plus technology keeps the low profile shape reducing chainstay and other contact, and adds a chain tensioning device reducing noise and dropped chains
• Compatible with Dyna-Sys 10 speed Shimano products
• Aluminum construction with sealed bearing pulleys
• 4 fluoric coated link pivot bushings for smooth operation
• Shimano Reference Number: RD-M640

Dyna-Sys specific cable pull for (HG-X) 10 speed mountain drivetrains, improved cable routing, shadow design help eliminate drop out contact. Direct mount frame compatible. Aluminum construction with sealed bearing 11-tooth guide pulley. Shadow plus cage tensioner to help eliminate chain bounce and quiet down the drivetrain.