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Shimano ZEE RD-M640 Shadow Plus Rear Derailleur

Sale $46.98 - $61.99

Item # SHI002H

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  • One Color, DH ($46.98)
  • One Color, FR ($61.99)
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Item # SHI002H

It's ZEE best derailleur around.

Chain slap is something we all have to live with, but Shimano's ZEE RD-M640 Shadow Plus makes it a whole lot less cringe-inducing by including its now-famous clutch technology. By increasing spring tension when it's engaged, the clutch reduces slap and the risk of dropping a chain, making it a killer choice for riders who spend decent chunks of their time pounding through rock gardens and over rugged trails. When the clutch is off, the reduced tension makes it easy to pop the derailleur out of the way for wheel removal. It's made of aluminum and steel, so it's durable enough to be knocked around with no ill effects, and comes in both a DH and Freeride model, so you can dial it in for the type of riding you do most often.

  • Aluminum and steel construction
  • 10 speed
  • Short cage
  • DH (28-tooth max) and Freeride (36-tooth max) versions available

Tech Specs

Material:
aluminum, steel
Cage Length:
short
Recommended Use:
mountain biking

Reviews & Community

REVIEWS

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Shifts great and and cheaper vs saint!

    Bent my Saint short cage, bought this and it shifts just as well. Great to save some money! Installed with no issues.

    Great for a DH rig

    • Familiarity: I've used it several times

    After a few rides I'm pretty impressed with this thing. Shifts smooth, zero chain slap and I love the fact that there's a clutch. You can't beat the price either.

    Shimano > *

    • Familiarity: I've put it through the wringer

    This derailleur rocks. I've got the medium cage on my 1x10 hardtail and with the clutch I don't need a guide. Chain slap is a thing of the past with the Shadow awesomeness.

    ZEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE!!!

      Purchased this ZEE derailleur to convert my wife's Myka FSR from a 2x9 to a 1X10. For the inexpensive price this derailleur works great. She's had no issues since I put this on a few months back.

      Zee for Dayz!

      • Familiarity: I've put it through the wringer

      I put the Zee paired up with a RaceFace Narrow wide ring up front and I have never had any issues with the chain falling off. The clutch system works just like it should, keeps the chain nice and tight and the short cage really keeps down the rattle while bombing those tight single track runs. Shifting is smooth and has a great look to it. Very impressed with the Zee system.

      Impressive Unit

      • Familiarity: I've put it through the wringer

      I've got this derailleur mated with ZEE cranks and 1x10 speed XT gearing. With a Narrow Wide ring upfront no chain guide and the clutch engaged I have had no issues with the chain derailing and the shifting is smooth as silk. Before installing the NW ring I did have a few issues with the bike spitting the chain, but once I upgraded there were zero issues. So far so good with the ZEE!