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Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items.

Shimano Deore M591 SGS Rear Derailleur

USD$32.99 45% off USD$59.99 msrp
Item #: RD277A01
USD$32.99 45% off USD$59.99 msrp
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The Deore series is a staple of the Shimano lineup, offering outstanding performance at an affordable price.
  • Proven technologies deliver durability and reliability
  • Versatile design, on or off road
  • Double Servo-Panta mechanism for smooth consistent shifts
  • Light weight aluminum/steel construction, approximate weight 292 grams
  • Optimized for use with Shimano 9 speed, will also work with Shimano 7 and 8 speed.
  • NOT compatible with Shimano Dyna-Sys 10-speed MTB Components. Compatible with Shimano 10-speed Road components.
  • Maximum front difference: 22T
  • Max Rear Sprocket: 34T
  • Total Capacity: 45T
  • Clutch: No



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REVIEW SNAPSHOT®

by PowerReviews
Shimano Deore M591 SGS Rear Derailleur
 
4.7

(based on 25 reviews)

Ratings Distribution

  • 5 Stars

     

    (17)

  • 4 Stars

     

    (8)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to install (23)
  • Precise shifting (17)
  • Durable (14)
  • Enhances pedaling efficiency (6)
  • Lightweight (3)

Cons

No Cons

Best Uses

  • Mountain biking (20)
  • Road biking (8)
    • Reviewer Profile:
    • Avid cyclist (17), Casual/ recreational (6)
    • Was this a gift?:
    • No (24)

Reviewed by 25 customers

Displaying reviews 1-10

Back to top

Previous | Next »

 
5.0

Great product from Shimano

By CLT Biker

from Charlotte, NC

About Me Avid Cyclist

Verified Buyer

Pros

  • Durable
  • Easy To Install
  • Enhances Pedaling Efficiency
  • Lightweight
  • Precise Shifting

Cons

    Best Uses

    • Mountain Biking

    Comments about Shimano Deore M591 SGS Rear Derailleur:

    Had to replace my stock deraulleur which was not performing well anymore. Found this one through a friend who had his installed and he could not be happier. And the price was a steal.

    • Was this a gift?:
    • No
     
    5.0

    Works like advertised

    By Rick in NB

    from North Bay, ON

    About Me Casual/ Recreational

    Verified Buyer

    Pros

    • Durable
    • Easy To Install

    Cons

      Best Uses

      • Mountain Biking

      Comments about Shimano Deore M591 SGS Rear Derailleur:

      Easy to install, shipped quickly to canada. More durable than my previous shimano rear mech.

      • Was this a gift?:
      • No
       
      4.0

      I have purchased and used this item several times

      By Yobilly

      from Riverside

      About Me Casual/ Recreational

      Verified Buyer

      Pros

      • Durable
      • Easy To Install
      • Not the lightest but not junk at all.
      • Precise shifting, simple installation

      Cons

      • No faults found

      Best Uses

      • Mountain Biking

      Comments about Shimano Deore M591 SGS Rear Derailleur:

      Typical Shimano quality and reliability. Yes there are better models but this model holds up extremely well even in extreme conditions.

      • Was this a gift?:
      • No
       
      4.0

      Steady on the Ready...

      By Shut Up Legs!

      from Spokane Valley,WA

      About Me Avid Cyclist

      Verified Buyer

      Pros

      • Durable
      • Easy To Install
      • Enhances Pedaling Efficiency
      • Precise Shifting

      Cons

        Best Uses

        • Mountain Biking
        • Road Biking

        Comments about Shimano Deore M591 SGS Rear Derailleur:

        "Deore",...a classic.

        • Was this a gift?:
        • No
         
        5.0

        This is my second one. Have two MTB. Shims no m591 sgs

        By Rick Kaz

        from Cape Cod Ma.

        About Me Casual/ Recreational

        Verified Buyer

        Pros

        • Durable
        • Easy To Install
        • Enhances Pedaling Efficiency
        • Lightweight
        • Precise Shifting
        • Trust worthy

        Cons

          Best Uses

          • Mountain Biking

          Comments about Shimano Deore M591 SGS Rear Derailleur:

          Great all around part

          • Was this a gift?:
          • No

          (1 of 1 customers found this review helpful)

           
          5.0

          The perfect rear derailleur

          By BikeFred

          from Fredericksburg, TX

          About Me Avid Cyclist

          Verified Buyer

          Pros

          • Durable
          • Easy To Install
          • Great Range and Capacity
          • Precise Shifting

          Cons

            Best Uses

            • Road Biking
            • Touring

            Comments about Shimano Deore M591 SGS Rear Derailleur:

            I run the Deore on all three of my bicycles... adventure bike, monster cross, and tandem. It works great with 8-speed and 9-speed drive trains.

            On the tandem it is 9 speed and runs a 11-34 cassette effortlessly. The single bikes are both teamed with 8-speed 11-32 cassettes and cranksets that are 22x36 and 26x36. The Deore is a solid shifting derailleur that is at home on any road surface - gravel preferred.

            Paired with Shimano barend shifters, this is the perfect shifting combination.

            • Was this a gift?:
            • No

            (1 of 1 customers found this review helpful)

             
            5.0

            Works with 36-11 cassette holds 25 chain links

            By Jay

            from Perris ca.

            About Me Casual/ Recreational

            Verified Buyer

            Pros

            • Easy To Install

            Cons

              Best Uses

              • Mountain Biking

              Comments about Shimano Deore M591 SGS Rear Derailleur:

              Made it work with 50 tooth range of gears on touring tandem bike . 50-38-24 and 36-11

              • Was this a gift?:
              • No
               
              5.0

              Bombproof commute

              By JDUBZ

              from Chicago

              About Me Avid Cyclist

              Verified Buyer

              Pros

              • Durable
              • Easy To Install
              • Precise Shifting

              Cons

                Best Uses

                  Comments about Shimano Deore M591 SGS Rear Derailleur:

                  I run 8spd in the back on my commuter bikes because the chain is stronger and winters are rough. This derailleur makes it through about three winters before it starts showing signs of poor performance. With all the snow, salt and rain you see in a typical season you cant ask for a better derailleur for the price.

                  • Was this a gift?:
                  • No
                   
                  5.0

                  smooth, yet chrisp shifts

                  By ManuChao

                  from SurCal

                  About Me Avid Cyclist

                  Verified Buyer

                  Pros

                  • Durable
                  • Easy To Install
                  • Precise Shifting
                  • Price

                  Cons

                  • None So Far

                  Best Uses

                  • Mountain Biking

                  Comments about Shimano Deore M591 SGS Rear Derailleur:

                  Can't go wrong for the asking price..

                  • Was this a gift?:
                  • No
                   
                  4.0

                  Finally!!!

                  By El Poeta

                  from El Paso, Texas

                  About Me Commuter

                  Verified Buyer

                  Pros

                  • Easy To Install
                  • Enhances Pedaling Efficiency

                  Cons

                    Best Uses

                    • Mountain Biking

                    Comments about Shimano Deore M591 SGS Rear Derailleur:

                    I use my Cannodale Prophet not only to hit the desert trails out here in El Paso Texas and surrounding southwest deserts but also to commute to work. I'm not sure what brand I even had before but it was an awful derailleur that I had constant issues. Bought this Shimano and wow! Easy install and minor adjusting and I'm hitting my gears without thinking about it now. Just what I wanted and very affordable.

                    • Was this a gift?:
                    • No

                    Displaying reviews 1-10

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                    Free Shipping Offer

                    Get free Standard Shipping with your $50 purchase today! Just choose Standard Shipping during checkout.

                    Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items.