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

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

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Utilizing the SHIMANO SHADOW RD+ design, the SHIMANO DEORE M5120 rear derailleur delivers consistent MTB shifting performance over rough terrain.

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The low profile design avoids damage from rocks whiles SHIMANO's chain stabilizing technology reduces chain drop and makes for a quiet drivetrain in all gear positions.


  • Stable drivetrain on the trail
  • Low-profile design avoids damage from rocks
  • Chain stabilizer reduces chain drop, slap and noise
  • Silent drivetrain in all gear positions
  • Decreased rear derailleur and chain tension in low gear
  • Max. low sprocket
  • 42T (2x11/10-speed), 46T (1x10-speed)


Model No. RD-M5120-SGS
Series DEORE M5100 Series
Colour Series color
Compatible chain HG-X11 11-speed HG-X 10-speed
Total capacity 41T
B-axle Hollow axle Yes
B-axle 2 Hollow axle Yes
Direct Mount attachment (Conventional) Yes
Direct Mount Yes
Fluoric coated link bushings 4
Low sprocket Max. 46T (1x11/1x10-speed), 42T (2x11/2x10-speed)
Low sprocket Min. 42T
Max. front difference 10T
Pulley Sunken type is pulley bolt Yes
Pulley Teeth 11T
Pulley cage SGS
Top-normal spring type is SHIMANO SHADOW RD+ Yes
Top sprocket Max. 11T
Top sprocket Min. 11T
Rear speeds 11/10
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