Technologies
Shimano Shadow RD+ – Less distraction quiet drive train. Rear derailleur stabilizer reduces chain slap. Simple solution for chain drop. Lighter and more efficient than roller type chain device

Features
Fast and shockless shifting
Low-profile design
Extra wide range 12-speed drivetrain -10-51T (12-speed) -10-45T(12-speed)
Decreased rear derailleur and chain tension in low gear
New bumper added to rear derailleur pulley cage
Bigger 13T pulley
Advanced shifting performance provides the confidence to enjoy any trail
Silent drivetrain in all gear positions
Stable drivetrain on rough terrain
Specifications
| B-Axle – Hollow axle | Yes |
|---|---|
| B-axle 2 – Hollow axle | Yes |
| Compatible chain | HG 12-speed |
| Direct attachment (Conventional) | Yes |
| Fluoric coated link bushings | 4 |
| Low sprocket – Max. | 51T |
| Low sprocket – Min. | 45T |
| Max. front difference | 0T |
| Pulley – Sunken type pulley bolt | Yes |
| Pulley – Teeth | 13T |
| Pulley cage | SGS |
| Rear speeds | 12-speed |
| Top-Normal Spring Type | Shimano Shadow RD+ |
| Top sprocket – Max. | 10T |
| Top sprocket – Min. | 10T |
| Total capacity | 41T |










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