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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
 
4.6

(based on 10 reviews)

Ratings Distribution

  • 5 Stars

     

    (6)

  • 4 Stars

     

    (4)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Durable (9)
  • Attractive (7)
  • Easy to install (7)
  • Lightweight (3)

Cons

    Best Uses

    • Mountain biking (10)
      • Reviewer Profile:
      • Avid cyclist (4), Casual/ recreational (4)
      • Was this a gift?:
      • No (9)

    Reviewed by 10 customers

    Sort by

    Displaying reviews 1-10

    Back to top

     
    5.0

    Low bling - Great RD

    By nt5k

    from Minneapolis, MN

    About Me Competitive Cyclist

    Verified Buyer

    Pros

    • CHEAP
    • Works Perfect

    Cons

    • NONE

    Best Uses

    • Mountain Biking
    • Racing

    Comments about Shimano SLX M663 OE Rear Derailleur:

    Needed a cheap fast replacement for a busted xtr RD. Nailed it.

    • Was this a gift?:
    • No
     
    5.0

    easy to setup and durable

    By alberto95

    from Ponce, PR

    About Me Casual/ Recreational

    Verified Reviewer

    Pros

    • Attractive Design
    • Durable
    • Lightweight

    Cons

      Best Uses

      • Mountain Biking

      Comments about Shimano SLX M663 OE Rear Derailleur:

      this thing is easy to setup, no need to tamper all around to make it work, and has the shimano seal for durability and dependability.

      • Was this a gift?:
      • No
       
      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 1-10

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