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


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


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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