Shimano Alivio M3100-SGS 9-Speed Rear Derailleur

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Ride aggressively with fewer interruptions using the Shimano Alivio M3100-SGS 9-speed rear derailleur. Its low-profile design and Shadow RD technology reduce chain drop, slap and noise.

  • Features

    • Low-profile Shadow RD system features a chain stabilizer that can be switched on or off to match terrain, reducing chain slap for a quieter ride and better chain retention
    • Low-profile design avoids damage from rocks
    • 45-tooth total capacity with 36-tooth maximum low sprocket size
    • Adjustment barrel lets you dial your shifting performance


    View the Shimano Alivio Product Line View all Shimano Rear Derailleurs
  • Technical Specs

    Best Use

    Mountain Biking

    Derailleur Type


    Cage Length

    Long Cage

    Max Rear Cog Size






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