Shimano ZEE RD-M640-SS Rear Derailleur - 10 Speed, Short Cage, With Clutch 2017 Ships within United States Buy Online or Click & Collect Share Loading Facebook Like button... Shimano ZEE RD-M640-SS Rear Derailleur - 10 Speed, Short Cage, With Clutch 2017 Ships within United States Buy Online or Click & Collect Share Loading Facebook Like button...