M21 Rear Derailleur 6/7 Speed Short Cage

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

Features.

  • Robust attachment body improves durability and shifting response

Specification

Speed

7-Speed, 6-Speed

Cage Length

Short Cage

Max Cog

28-30T

Min Cog

13-14T

Capacity

37T

Clutch

No

Attachment

Standard Mount (RD-M21S), Claw Mount (RD-M21SA)

Body Material

Steel / Composite

Cage Material

Steel

Compatibility

Shimano Mountain

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Support

Mountain

Road

Support

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Resources

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