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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 20 reviews)

Ratings Distribution

  • 5 Stars

     

    (14)

  • 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 (18)
  • Precise shifting (14)
  • Durable (9)
  • Enhances pedaling efficiency (3)

Cons

No Cons

Best Uses

  • Mountain biking (15)
  • Road biking (7)
    • Reviewer Profile:
    • Avid cyclist (15), Casual/ recreational (3)
    • Was this a gift?:
    • No (19)

Reviewed by 20 customers

Displaying reviews 1-10

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(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
     
    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

                    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.