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RD-M21SSA SUPER SHORT CAGE (6/7 SPEEDS)
- Model No.:RD-M21SSA
- Cassette Compatibility: 6 / 7 Speed
- Cage Type: Super Short Cage
- Front Chainring:Single
- Max. Sprocket: 32T
- Min. Sprocket:11T
- Total Capacity: 21T
- Guide Pulley: Engineering Composite
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