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Shimano SLX M663 OE Rear Derailleur

Item #: RD242A02
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USD$34.99 61% off USD$89.99 msrp
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Customers Also Bought
10 Speed MTB! Shimano SLX Dyna-Sys takes legendary Shimano shifting to the next level of perfection. The shadow design lessens the chances of snagging a branch or clipping a rock while the direct cable routing lowers shifting effort. The wide pivots keep shifting smooth and consistent mile after mile.
  • 10 speed MTB Dyna-Sys
  • Lightweight design
  • Direct cable routing for effortless shifting
  • Wide pivots for consistent shifting
  • Shadow design
  • Long cage
  • Optimized for use with Dyna-Sys components only
  • This derailleur is not backwards compatible, it will only work with 10 speed Dyna-Sys shifters
  • Weight: 273g
Please Note: This is marked an OE Item because it lacks original packaging. The item has never been installed or used.
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REVIEW SNAPSHOT®

by PowerReviews
Shimano SLX M663 OE Rear Derailleur
 
4.5

(based on 8 reviews)

Ratings Distribution

  • 5 Stars

     

    (4)

  • 4 Stars

     

    (4)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Durable (8)
  • Easy to install (7)
  • Attractive (6)

Cons

    Best Uses

    • Mountain biking (8)
      • Reviewer Profile:
      • Avid cyclist (4), Casual/ recreational (3)
      • Was this a gift?:
      • No (7)

    Reviewed by 8 customers

    Sort by

    Displaying reviews 1-8

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    4.0

    Good upgrade for older hardtail

    By WiAlan

    from Wisconsin

    About Me Competitive Cyclist

    Verified Reviewer

    Pros

    • Durable
    • Easy To Install

    Cons

      Best Uses

      • Mountain Biking

      Comments about Shimano SLX M663 OE Rear Derailleur:

      Converting an older Specialized hardtail to 1x10 as an XC race bike. SLX rear der. worked great for this and I am happy with the performance after a summer's riding.

      • Was this a gift?:
      • No
       
      4.0

      No Problems

      By mtbjunkie

      from Buena Vista, CO

      About Me Avid Cyclist

      Pros

      • Attractive Design
      • Durable
      • Easy To Install

      Cons

        Best Uses

        • Mountain Biking

        Comments about Shimano SLX M663 OE Rear Derailleur:

        No problems so far. This is my first go-round with a 10sp drivetrain and I'm loving the SLX group. I wish it had the clutch, but other than that, no complaints.

         
        5.0

        Can't get any better

        By Van H

        from Puerto Rico island

        About Me Avid Cyclist

        Verified Reviewer

        Pros

        • Attractive Design
        • Durable
        • Easy To Install

        Cons

          Best Uses

          • Mountain Biking

          Comments about Shimano SLX M663 OE Rear Derailleur:

          Even when shimano recommends dyna-sys cassette and chain I'm using sram. Works perfect.

          • Was this a gift?:
          • No
           
          4.0

          I was quite pleased with the performance

          By yobilly

          from Riverside, CA.

          About Me Casual/ Recreational

          Verified Buyer

          Pros

          • Attractive Design
          • Durable
          • Easy To Install
          • Lightweight

          Cons

            Best Uses

            • Mountain Biking

            Comments about Shimano SLX M663 OE Rear Derailleur:

            I was quite pleased with the performance of this derailleur. Once dialed in it works flawlessly

            • Was this a gift?:
            • No
             
            5.0

            Great Derailleur

            By Masterofbikes

            from Boulder, CO

            About Me Casual/ Recreational

            Verified Buyer

            Pros

            • Attractive Design
            • Durable
            • Easy To Install

            Cons

              Best Uses

              • Mountain Biking

              Comments about Shimano SLX M663 OE Rear Derailleur:

              Buy an OE products and save money. Derailleur was new just without the original packaging.

              • Was this a gift?:
              • No
               
              5.0

              Works great!

              By Fishyhead

              from Orange County, CA

              About Me Casual/ Recreational

              Verified Reviewer

              Pros

              • Durable
              • Easy To Install

              Cons

                Best Uses

                • Casual Riding
                • Mountain Biking

                Comments about Shimano SLX M663 OE Rear Derailleur:

                I was piecing together a frame and decided to go with a 1X10 setup and read about how great the clutch type derailleurs are. I was going to buy the ZEE free ride model for it's short cage but wasn't sure if I was going to stick with 1X10 or not since this is my first mountain bike in 10+ years. The derailleur came as described - sans retail packaging but was brand new and installed perfectly. Paired with a Zee shifter, this bike shifts GREAT uphill under load with me stomping on the pedals. Shifts are quick and positive and I heard no chain slap. Great deal!

                • Was this a gift?:
                • No
                 
                5.0

                I buy Shimano rear derailleur again

                By El asimetrico

                from Queretaro, Mexico

                About Me Avid Cyclist

                Verified Buyer

                Pros

                • Attractive Design
                • Durable
                • Lightweight

                Cons

                  Best Uses

                  • Mountain Biking

                  Comments about Shimano SLX M663 OE Rear Derailleur:

                  I Buy this Shimano SLX Sl-660-10 shifters and a SLX M663 Rear Derailleur to upgrade my Deore 27 speed system. I'm a one handed rider and I do not have time for troubles when I'm in the mountain. These shifters are very reliable, smooth and precise. I'm certain which gear I'm using even I remove the VDO part to accommodate both shifters and both brakes in one side of the handle bar. I feel happy and confident with this purchase.

                  • Was this a gift?:
                  • No

                  (1 of 1 customers found this review helpful)

                   
                  4.0

                  much needed upgrade

                  By adrian

                  from Pearland, TX

                  About Me Avid Cyclist

                  Verified Reviewer

                  Pros

                  • Attractive Design
                  • Durable
                  • Easy To Install

                  Cons

                    Best Uses

                    • Mountain Biking

                    Comments about Shimano SLX M663 OE Rear Derailleur:

                    I got this derailleur when I upgraded to a 10 speed from an 8 speed alivio set up. World of a difference in shifting this made. Crisp, clean shifts... and not to mention not having a chain drop since the switch! SLX is definitely in the sweet spot when it comes to the price/performance ratio.

                    • Was this a gift?:
                    • No

                    Displaying reviews 1-8

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