Technical Specifications
Model No. | RD-M21SS | RD-M21SSA |
Cassette Compatibility | 6 / 7 Speed | 6 / 7 Speed |
Cage Type | Super Short Cage | Super Short Cage |
Front Chainring | Single | Single |
Max. Sprocket | 32T | 32T |
Min. Sprocket | 11T | 11T |
Total Capacity | 21T | 21T |
Guide Pulley | Engineering Composite with Steel Bushing | Engineering Composite with Steel Bushing |
Tension Pulley | Engineering Composite with Steel Bushing | Engineering Composite with Steel Bushing |
Bracket Body | Resin / Black | Resin / Black |
Mount Type | Direct Attachment | Reverse Bracket Type |
Bracket Pivot Seal | N | N |
Plate Body | Resin / Black | Resin / Black |
Plate Pivot Seal | N | N |
Outer Link | Resin Steel | Resin Steel |
Inner Link | Black Steel | Black Steel |
Link Pin Bushing | N | N |
Outer Plate | Black Painted Steel | Black Painted Steel |
Inner Plate | Black Painted Steel | Black Painted Steel |
Weight | 241g | 241g |
Compatibility | Shimano 6 / 7 Speed Rear Derailleur Compatible | Shimano 6 / 7 Speed Rear Derailleur Compatible |