RD-M21S / SA / SB

RD-M21S

Rear Derailleur for 2 x 6 / 7 Speed

Direct Attachment Type

Short Cage

  • Max. Sprockets:  32T
  • Total Capacity:  37T

RD-M21SA

Rear Derailleur for 2 x 6 / 7 Speed

Reverse Bracket Type

Short Cage

  • Max. Sprockets:  32T
  • Total Capacity: 37T

RD-M21SB

Rear Derailleur for 2 x 6 / 7 Speed

Bracket Type

Short Cage

  • Max. Sprockets:  32T
  • Total Capacity: 37T

Technical Specifications

Model No.RD-M21SRD-M21SARD-M21SB
Cassette Compatibility6 / 7 Speed6 / 7 Speed6 / 7 Speed
Cage TypeShort CageShort CageShort Cage
Front ChainringDoubleDoubleDouble
Max. Sprocket32T32T32T
Min. Sprocket11T11T11T
Total Capacity37T37T37T
Guide PulleyEngineering Composite with Steel BushingEngineering Composite with Steel BushingEngineering Composite with Steel Bushing
Tension PulleyEngineering Composite with Steel BushingEngineering Composite with Steel BushingEngineering Composite with Steel Bushing
Bracket BodyResin / BlackResin / BlackResin / Black
Mount TypeDirect AttachmentReverse Bracket TypeBracket Type
Bracket Pivot SealNNN
Plate BodyResin / BlackResin / BlackResin / Black
Plate Pivot SealNNN
Outer LinkResin SteelResin SteelResin Steel
Inner LinkBlack SteelBlack SteelBlack Steel
Link Pin BushingNNN
Outer PlateBlack Painted SteelBlack Painted SteelBlack Painted Steel
Inner PlateBlack Painted SteelBlack Painted SteelBlack Painted Steel
Weight269g269g269g
CompatibilityShimano 6 / 7 Speed MTB Rear Derailleur CompatibleShimano 6 / 7 Speed MTB Rear Derailleur CompatibleShimano 6 / 7 Speed MTB Rear Derailleur Compatible

Instructions

Instructions Manual

Installation Manual

MTB Rear Derailleur Installation Manual for RD-M21

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