The 10 speed Zee RD-M640 features Shadow Plus technology that significantly reduces chain noise and offers a more stable drivetrain.
  • pretty_bullet.png SHIMANO Shadow RD+ Short cage
  • pretty_bullet.png MTB 10-speed stable system
  • pretty_bullet.png Low-profile design
  • pretty_bullet.png Close Ratio
  • pretty_bullet.png Wide ratio spec for Free ride >11-32T
  • pretty_bullet.png Close ratio spec for DH <11-28T
  • pretty_bullet.png Direct Mount Rear Derailleur option

Product Specs

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Model Number RD-M640-SS
Series ZEE
Shifting Action Top-Normal
Mount Type Direct Attachment
Maximum Sprocket 36T(Freeride spec) 28T(DH spec)/12T
Minimum Sprocket 23T/11T
Front Difference Front single use
Total Capacity 25T
Link Pin Bushings 3
Average Weight 250g