The Shimano Tourney TY300-SGS rear derailleur features SIS Rear Indexing and Double Servo technologies to provide smooth action with perfect tracking for the most accurate SIS shifting.SIS Rear Index Shifting System provides smooth action Double Servo enables the guide pulley to track the cogs closely while moving front to back optimizing each shift Designed to keep the rear derailleur guide pulley at an optimum distance from each sprocket for accurate SIS shifting 13t upper and lower pulleys Compatible with HG 6/7/8 speed chains
| Largest Cog | 34 |
| Color | Black |
| Rear Der/Shifter Compatibility | Shimano Mountain |
| Rear Derailleur Mount Type | 10x1 Standard, Dropout Claw Hanger |
| Drivetrain Speeds | 7 |
| Chain Wrap Capacity (teeth) | 43 |
| Cage Length | Long |
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