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Shimano SLX M663 Rear Derailleur

USD$39.99 56% off USD$89.99 msrp
Item #: RD242A02
USD$39.99 56% off USD$89.99 msrp
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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.

REVIEW SNAPSHOT®

by PowerReviews
Shimano SLX M663 Rear Derailleur
 
4.6

(based on 12 reviews)

Ratings Distribution

  • 5 Stars

     

    (7)

  • 4 Stars

     

    (5)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Durable (10)
  • Easy to install (9)
  • Attractive (8)
  • Lightweight (3)

Cons

No Cons

Best Uses

  • Mountain biking (12)
    • Reviewer Profile:
    • Avid cyclist (5), Casual/ recreational (5)
    • Was this a gift?:
    • No (11)

Reviewed by 12 customers

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Displaying reviews 1-10

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5.0

Superb value

By CycloChassid

from Israel

About Me Avid Cyclist

Verified Buyer

Pros

  • Easy To Install

Cons

    Best Uses

    • Mountain Biking

    Comments about Shimano SLX M663 Rear Derailleur:

    This completed my upgrade from 3x9 to 3x10.

    • Was this a gift?:
    • No
     
    4.0

    Great value

    By THEB

    from Buenos Aires, Argentina

    About Me Casual/ Recreational

    Verified Buyer

    Pros

    • Attractive Design
    • Durable
    • Easy To Install

    Cons

    • Heavy

    Best Uses

    • Mountain Biking

    Comments about Shimano SLX M663 Rear Derailleur:

    Great 10 speed rear derailleur. It´s a litle heavier than XT or XTR, but much cheaper.
    It does the job great.
    I wonder why shimano offers the same jockey wheels for all (inclusive high-end) derailleurs. I change those for a ceramic bearing Jockey wheels.

    • Was this a gift?:
    • No
     
    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 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 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

      (0 of 1 customers found this review helpful)

       
      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 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 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 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 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 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 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

                  Displaying reviews 1-10

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                  Get free shipping with your $50 purchase today when you choose Standard Shipping at 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

                   

                  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.