Shimano Deore RD-M5120-SGS Rear Derailleur – 10/11-Speed

Model and compatibility

• Model: RD-M5120-SGS.
• Shimano-listed drivetrain configurations: 2×11-speed, 1×10-speed and 2×10-speed.
• Maximum low sprocket: 42T for 2×11/10-speed; 46T for 1×10-speed.
• Shadow RD+ stabiliser helps control chain movement and noise.

Choose the right replacement

Match the derailleur with the correct shifter, chain, cassette, front gearing and frame hanger. Check Shimano’s RD-M5120-SGS guidance for your complete drivetrain configuration before ordering.

Installation and care

Supplied as the rear derailleur shown in the original supplier photograph. Follow Shimano’s installation and adjustment instructions, set chain length and indexing correctly, and check shifting and clearances before riding. Use a qualified bicycle mechanic if you are unsure about fitting.