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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, approximate weight 299 grams
  • Optimized for use with Shimano 9 speed, will also work with Shimano 8 speed



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REVIEW SNAPSHOT®

by PowerReviews
Shimano Deore M591 SGS Rear Derailleur
 
4.7

(based on 19 reviews)

Ratings Distribution

  • 5 Stars

     

    (13)

  • 4 Stars

     

    (6)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Easy to install (17)
  • Precise shifting (13)
  • Durable (8)
  • Enhances pedaling efficiency (3)

Cons

No Cons

Best Uses

  • Mountain biking (15)
  • Road biking (6)
    • Reviewer Profile:
    • Avid cyclist (14), Casual/ recreational (3)
    • Was this a gift?:
    • No (18)

Reviewed by 19 customers

Displaying reviews 1-10

Back to top

Previous | Next »

 
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
           
          4.0

          Great mid level upgrade

          By Jdbsmd

          from South Florida

          About Me Avid Cyclist

          Verified Buyer

          Pros

          • Durable
          • Easy To Install
          • Precise Shifting

          Cons

            Best Uses

            • Mountain Biking

            Comments about Shimano Deore M591 SGS Rear Derailleur:

            Replaced an Altus with this on my wife's mountain bike. Definitely a major upgrade.
            Can't go wrong with Shimano.

            • Was this a gift?:
            • Yes
             
            5.0

            second puchase as upgrade

            By nick

            from li ny

            About Me Avid Cyclist

            Verified Buyer

            Pros

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

            Cons

              Best Uses

              • Road Biking

              Comments about Shimano Deore M591 SGS Rear Derailleur:

              great product , super price

              • Was this a gift?:
              • No
               
              4.0

              Just like stock

              By Eden

              from Killington, VT

              About Me Avid Cyclist

              Verified Buyer

              Pros

              • Durable
              • Easy To Install

              Cons

                Best Uses

                • Mountain Biking

                Comments about Shimano Deore M591 SGS Rear Derailleur:

                This replaced my stock derailleur and it is identical. The shipping was great. I was able to get by bike back and running in 2 days!

                • Was this a gift?:
                • No
                 
                4.0

                Great value for a Shimano product

                By Spoke Buster

                from San Jose, CA

                About Me Avid Cyclist

                Verified Buyer

                Pros

                • Easy To Install
                • Precise Shifting

                Cons

                  Best Uses

                  • Mtn Cassette On Road Bike
                  • Road Biking

                  Comments about Shimano Deore M591 SGS Rear Derailleur:

                  I use 11-32 mountain cassette on my road bike and this derailleur works great to get into that 32 gear.

                  • Was this a gift?:
                  • No
                   
                  5.0

                  Excellent Deraileur Great Price

                  By Big D

                  from Southern Oregon

                  About Me Avid Cyclist

                  Verified Buyer

                  Pros

                  • Easy To Install
                  • Precise Shifting

                  Cons

                  • Heavy

                  Best Uses

                  • Road Biking

                  Comments about Shimano Deore M591 SGS Rear Derailleur:

                  I was hesitant to buy usually prefer XT or Better. But this outperforms my 10yr old XT derailleur by far. Fast Precise shifting. For the money you cannot beat it!!!

                  • Was this a gift?:
                  • No

                  (1 of 1 customers found this review helpful)

                   
                  5.0

                  Works with STI shifters on a road bike!

                  By Old Guy

                  from Northern Arizona

                  About Me Avid Cyclist

                  Verified Reviewer

                  Pros

                  • Easy To Adjust
                  • Easy To Install
                  • Precise Shifting
                  • Precise Shifting Across

                  Cons

                  • None Found Yet

                  Best Uses

                  • Mountain Biking
                  • Road Biking

                  Comments about Shimano Deore M591 SGS Rear Derailleur:

                  Although Deore is a MTB derailleur, I decided to give it a try on my road bike. I was in need of a nine speed derailleur with 32 tooth cog capacity and it has become difficult to find that combination in a road bike derailleur now, with every thing being ten or eleven speed. This derailleur works perfectly with STI shifters, with precise cog alignment with each shift and the shifts are very smooth. I am well pleased with the product and pleasantly surprised that it works with STI.

                  • 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.