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Shimano SLX RD-M663 Rear Derailleur
Item #: RD272A00
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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 changes of snagging a branch or clipping a rock while the direct cable routing lowers shifting effort. The wide pivots keep shifting smooth and consistent for 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
- This derailleur is not backwards compatible, it will only work with 10 speed shifters
- Shimano shifters
REVIEW SNAPSHOT®
by PowerReviewsShimano SLX RD-M663 Rear Derailleur
(based on 12 reviews)
Ratings Distribution
92%
of respondents would recommend this to a friend.
Most Liked Positive Review
Tough little guy
So I bought the slx to replace my rather unsatisfactory derailleur (hint, not shimano) and noticed immediately that it was going to work better just based on the shadow technology since I knew it...Read complete review
So I bought the slx to replace my rather unsatisfactory derailleur (hint, not shimano) and noticed immediately that it was going to work better just based on the shadow technology since I knew it wouldn't be sticking out and hitting rocks (something i actually do quite a bit). Once it was installed though I knew it was going to pay for itself very soon, the shifting was awesome and because there wasn't a ton of adjustment knobs I didn't have to worry about it getting out of whack much. My favorite feature was, like I anticipated, the toughness and shadow technology. This thing can take a beating, i've crashed the bike, dropped it multiple times on the drive side and accidentally kicked it but it still worked wondrously. The shadow technology helped protect it from a thousand other hits though, and that alone helped preserve the thing. My one and only complaint? I can no longer enjoy the product since my bike was stolen last year (saddest day ever). I highly recommend this as well as all other Shimano products, they always keep getting better and last forever.
VS
Most Liked Negative Review
Worked great while it lasted
This was great for xc riding and lasted maybe 50 miles total before being ripped off by a twig/stick a little larger than a pen. To me it seems far too fragile. Had ...Read complete review
This was great for xc riding and lasted maybe 50 miles total before being ripped off by a twig/stick a little larger than a pen. To me it seems far too fragile. Had a Shimano LX from 2005 that lasted until April 2012. The SLX only lasted one month. For a budget derailluer I would go with the LX over SLX.
Reviewed by 12 customers
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Displaying reviews 1-10
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Pros
- Easy To Install
- Precise Shifting
Cons
Best Uses
- Mountain Biking
Comments about Shimano SLX RD-M663 Rear Derailleur:
This is much higher quality than the Deore of old days. Seems like quality derailleur for low price.
- Was this a gift?:
- No
Pros
- Quick When Dialed In
- Sharp shifting
Cons
Best Uses
- Mountain
Comments about Shimano SLX RD-M663 Rear Derailleur:
Having only had the cheaper stuff on past bikes the difference between this derailleur and the stock acera stuff is pretty amazing. Ive never had the XT stuff so I cant compare the two but if your thinking about this one buy it its a good one.
Pros
- Clean Shifts
Cons
Best Uses
- Am
- Trail
Comments about Shimano SLX RD-M663 Rear Derailleur:
Never had a problem with a Shimano derailleur. Had the 9 speed version of this derailleur on my old bike and put the 10 speed version on my new 1x10 29er. Works like a charm.
Pros
- Cost
- durability
- Shifts great
Cons
- none at this time
Best Uses
Comments about Shimano SLX RD-M663 Rear Derailleur:
I have owned this for about half a year and I havent needed to do a lot of adjusting on it since I got it. for the price I cant find a lot to complain about, I would recomend it to any one.
Pros
- Dependable
- Easy Install
- Easy setup
- Price Point
- Silent
- Smooth
Cons
- none
Best Uses
- XC
Comments about Shimano SLX RD-M663 Rear Derailleur:
The SLX line continues to impress time after time. Great balance of value, performance & dependability.
Pros
- cheap
- Good performance
- Reliable
Cons
- Chainslap
Best Uses
- Mountain Bike
Comments about Shimano SLX RD-M663 Rear Derailleur:
I have this on my do it all trailbike, and it has been great to me. Good value, and good shifting performance. For the price you pay you get a great derailleur.
Pros
- Low Chain Slap
- Smooth shifting
- value
Cons
Best Uses
- Cross
- Mountain
Comments about Shimano SLX RD-M663 Rear Derailleur:
I have this derailleur mounted on my Surly Cross Check (I wanted to have a 11-34 cassette for off road and touring). It's great - I've hardly had to adjust it over the last two years of hard riding, and the shadow design really does a good job of reducing chain slap. Pairs well with Tiagra brifters, too.
Pros
- Did I Mention Tough
- Easy to clean
- Fast
- Smooth
- Strong
- Super easy to adjust
Cons
- Took some time to set up
Best Uses
- Am
- Inexpensive Xc
- Light DH
Comments about Shimano SLX RD-M663 Rear Derailleur:
So I bought the slx to replace my rather unsatisfactory derailleur (hint, not shimano) and noticed immediately that it was going to work better just based on the shadow technology since I knew it wouldn't be sticking out and hitting rocks (something i actually do quite a bit). Once it was installed though I knew it was going to pay for itself very soon, the shifting was awesome and because there wasn't a ton of adjustment knobs I didn't have to worry about it getting out of whack much. My favorite feature was, like I anticipated, the toughness and shadow technology. This thing can take a beating, i've crashed the bike, dropped it multiple times on the drive side and accidentally kicked it but it still worked wondrously. The shadow technology helped protect it from a thousand other hits though, and that alone helped preserve the thing. My one and only complaint? I can no longer enjoy the product since my bike was stolen last year (saddest day ever). I highly recommend this as well as all other Shimano products, they always keep getting better and last forever.
Pros
- cheap
- Performance
Cons
- none
Best Uses
- Trail
Comments about Shimano SLX RD-M663 Rear Derailleur:
Tough to beat at this price point. Works great, quiet and efficient.
Pros
- Cost
- durability
- Performance
Cons
- none
Best Uses
Comments about Shimano SLX RD-M663 Rear Derailleur:
Bought this 2 years ago when the wheels on my LX derailer gave out. It was about the same price as new wheels for the old derailer! It is quiter and smoother shifting than the LX, plus the cable routing is better. Now that is on sale I'll buy another to have when this one wears out. It has taken a real beating on some big rocks and crashes with no problems.
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
